Free Essays on Revolución Francesa

à ndice 1. Introduccià ³n ................................................................3pg. 2. Contenido ...................................................................5pg 3. Conclusià ³n .................................................................27pg. 4. Bibliografà ­a .................................................................28pg 5. Anexos ........................................................................30pg. Introduccià ³n En la historia del mundo contemporneo, la revolucià ³n francesa significà ³ el trnsito de la sociedad estamental, heredera del feudalismo, a la sociedad capitalista, basada en una economà ­a de mercado. La burguesà ­a, consciente de su papel preponderante en la vida econà ³mica, desplazà ³ del poder a la aristocracia y a la monarquà ­a absoluta. Los revolucionarios franceses no sà ³lo crearon un nuevo modelo de sociedad y estado, sino que difundieron un nuevo modo de pensar por la mayor parte del mundo. El final del siglo XVIII fue una à ©poca de trastornos en muchas partes de hemisferio occidental, trastornos que se pueden atribuir, directa o indirectamente, al fermento de las ideas conocidas como la Ilustracià ³n. Estas ideas, reflejo de las necesidades y tensiones de una sociedad cambiante se basan en el nuevo conocimiento cientà ­fico del siglo XVII, que engendrà ³ una nueva fe en la razà ³n y en el progreso. por un lado, esto llevà ³ a un rechazo de la autoridad y a una afirmacià ³n de los Derechos del Hombre, expresados en la famosa declaracià ³n de Rousseau de que el hombre nace libre, pero en todas partes est encadenado. Por otro lado, las nuevas ideas fueron una inspiracià ³n para los monarcas, que al ternar el siglo XVII, empezaron a concentrar el poder en sus propias manos y a gobernar mediante agentes burocrticos nombrados por ellos. Sin embargo, estas actividades centralizadoras encontraron resistencia en todos aquellos que tenà ­an intereses creados en el Ant iguo rï ¿ ½... Free Essays on Revolucià ³n Francesa Free Essays on Revolucià ³n Francesa à ndice 1. Introduccià ³n ................................................................3pg. 2. Contenido ...................................................................5pg 3. Conclusià ³n .................................................................27pg. 4. Bibliografà ­a .................................................................28pg 5. Anexos ........................................................................30pg. Introduccià ³n En la historia del mundo contemporneo, la revolucià ³n francesa significà ³ el trnsito de la sociedad estamental, heredera del feudalismo, a la sociedad capitalista, basada en una economà ­a de mercado. La burguesà ­a, consciente de su papel preponderante en la vida econà ³mica, desplazà ³ del poder a la aristocracia y a la monarquà ­a absoluta. Los revolucionarios franceses no sà ³lo crearon un nuevo modelo de sociedad y estado, sino que difundieron un nuevo modo de pensar por la mayor parte del mundo. El final del siglo XVIII fue una à ©poca de trastornos en muchas partes de hemisferio occidental, trastornos que se pueden atribuir, directa o indirectamente, al fermento de las ideas conocidas como la Ilustracià ³n. Estas ideas, reflejo de las necesidades y tensiones de una sociedad cambiante se basan en el nuevo conocimiento cientà ­fico del siglo XVII, que engendrà ³ una nueva fe en la razà ³n y en el progreso. por un lado, esto llevà ³ a un rechazo de la autoridad y a una afirmacià ³n de los Derechos del Hombre, expresados en la famosa declaracià ³n de Rousseau de que el hombre nace libre, pero en todas partes est encadenado. Por otro lado, las nuevas ideas fueron una inspiracià ³n para los monarcas, que al ternar el siglo XVII, empezaron a concentrar el poder en sus propias manos y a gobernar mediante agentes burocrticos nombrados por ellos. Sin embargo, estas actividades centralizadoras encontraron resistencia en todos aquellos que tenà ­an intereses creados en el Ant iguo rï ¿ ½...

The 10 Best Art Schools in the United States

The 10 Best Art Schools in the United States SAT / ACT Prep Online Guides and Tips If you have a passion for art, you should go to a college that will nurture your creativity. An art school will help you to develop your skills and learn more about what it takes to succeed in the professional world of art and design. In this article, I'll give you the details on what defines a great art school and provide a list of the best art colleges in the country for undergraduate students. How Is an Art School Defined for This List? On this list of the best art schools in the United States, I only included schools that exclusively cater to art and design students. Keep in mind that there are many other colleges that have excellent art programs but are less specialized. Colleges like Yale, UCLA, Tufts, and Columbia also have fantastic art programs. I didn't include those schools because this list is geared towards students who are absolutely certain that they want to study art at the college level (and would like to be in an environment with similarly-minded people). There are huge advantages to going to a specialized art college if you fall into this category of students. You will make friends with other people who share your interests and who may inspire you to expand your creative horizons. You also will have the benefit of being in a place where art is never a secondary concern. Career services will be devoted to helping students in artistic fields break into the job world, and you can usually make even better connections with working artists at these schools. If you know that you plan on studying in an artistic field, the schools on this list are great college options. At a school full of art students, everyone has paint on their hands at all times, and you can be as pretentious as you want without facing judgment! What Makes These Art Schools the Best? There are several factors to consider in determining what makes an art school great. First of all, it should have a diverse and modern curriculum. A great art school equips students with the skills they need to enter a rapidly changing, highly competitive job market. It should offer a wide variety of programs that are in step with current artistic trends and movements. The best art schools are invested in providing students with instruction in design practices that are shaping the world’s creative landscape today. A great art school should have excellent facilities for students, with access to the latest technology and artistic tools. Many of the schools on this list have extensive digital labs, on-campus art museums, and workshops that provide students with the ability to practice metalworking, laser cutting, woodworking, and other less accessible artistic disciplines. The quality of the faculty is important as well. The best art schools employ professors who are also successful working artists and leaders in their fields. Reputation is another factor that ties into this. If the alumni of a school have been successful in their careers, the school will have better name recognition and provide you with more future opportunities. The schools on this list have strong combinations of these qualities (and more!). They encourage students to think critically about art-making in the context of modern society and provide students with great opportunities to find their niche within the exciting world of art and design. The art world is always in flux. Is this "graffiti" or "street art"? Or is it both? As methods and standards change, so do the curricula at art schools! The Best Art Schools in the US For each of the schools on this list, I will provide admissions statistics and information about application requirements. I’ve also listed a few facts that will give you a sense of what these institutions offer to undergraduate art students. #1. Rhode Island School of Design: Providence, RI Statistics Undergraduate enrollment: 1,976Acceptance rate: 29%Average GPA: 3.7Average SAT score: 1300Average ACT score: 28 Special Requirements Prospective applicants are urged to follow a college preparatory program in secondary school, taking courses in studio art and art history where possible. A portfolio submission is required for admissions consideration. Your portfolio should show a selection of 12–20 examples of your best recent artwork. This work may be presented in any medium (including film or video) in either finished or sketch form. It can be the result of an assigned project or a self-directed artistic exploration. You’ll also need to send in two drawing samples. For more details, see the admissions website. Notable Facts The campus museum displays over 80,000 works of art, so inspiration abounds! RISD offers advanced tools and resources to its students, including laser cutters and a kiln room. RISD also employs many famous faculty members like Chris Van Allsburg (who illustrated The Polar Express!). Rhode Island School of Design #2. School of the Art Institute of Chicago: Chicago, IL Statistics Undergraduate enrollment: 2,889Acceptance rate: 61%Average GPA: 3.5Average SAT score: Not reported Average ACT score: Not reported Special Requirements In order to be considered for admission, you will need to submit an artist’s statement that represents you and your work. You are also required to submit a portfolio that showcases 10-15 examples of your best and most recent work. There are no limitations on the artistic medium! Notable Facts The School of the Art Institute of Chicago has a facility called the Computer Resources and Information Technologies Center, which ensures that students get access to and training on the latest digital equipment. There are also unique program offerings like art therapy and visual communication. SAIC has many distinguished alumni, including Walt Disney. School of the Art Institute of Chicago #3. California Institute of the Arts: Valencia, CA Statistics Undergraduate enrollment: 984Acceptance rate: 24%Average GPA: Not reportedAverage SAT score: Not reportedAverage ACT score: Not reported Special Requirements You are required to submit 20 examples of your most recent and highest quality independent artwork for your portfolio. You’ll also need to include an artist’s statement. Notable Facts All faculty members at the California Institute of the Arts are working artists with lots of real world artistic experience. Every student is assigned a mentor who guides them through the program and assists them in independent study. CalArts has eight galleries dedicated to showing student work and helping students get accustomed to hanging and presenting art in various forms. The school provides extensive facilities for student use including various media labs and a â€Å"Super Shop† for processes such as woodworking, metalworking, and moldmaking. I'm not sure why they chose to go with "CalArts" as the shortened version of the school's name when CIA was an option. California Institute of the Arts #4. Pratt Institute: New York, NY Statistics Undergraduate enrollment: 3,439Acceptance rate: 50%Average GPA: 3.77Average SAT score: 1300Average ACT score: 26 Special Requirements You are required to submit a portfolio that includes 12-20 examples of your best work. You must also submit three to five observational drawings to demonstrate your drafting skills. Notable Facts Pratt is located in New York City, so you’ll have access to all kinds of great internship opportunities and connections to the art world. Faculty members are working artists with international reputations as well as dedicated teachers. Students get free access to the Frick Collection, the MOMA, the Whitney Museum, and more. Pratt Institute #5. Maryland Institute College of Art: Baltimore, MD Statistics Undergraduate enrollment: 1,694Acceptance rate: 62%Average GPA: 3.5Average SAT score: 1180Average ACT score: Not reported Special Requirements You must submit a portfolio of 12 to 20 pieces of artwork for consideration. Notable Facts The Maryland Institute incorporates internships and other professional development activities into its curriculum to give students a strong foundation for careers in the arts. There are over 150 exhibitions per year by Maryland Institute students, faculty, and visitors. A strong advising system guides students through all four years at MICA. Maryland Institute College of Art #6. ArtCenter College of Design: Pasadena, CA Statistics Undergraduate enrollment: 2,005Acceptance rate: Not reportedAverage GPA: Not reportedAverage SAT score: Not reportedAverage ACT score: Not reported Special Requirements There are different portfolio requirements for different majors, but, in general, you are required to submit 10 to 15 pieces of artwork. See the admissions site for more details. Notable Facts This school is for students who know exactly what they want to do: Art Center gives students a comprehensive education in their chosen discipline starting on day one and there is no first-year general education program. However, the Transdisciplinary Studios program also allows students to collaborate with each other across different majors. Art Center College of Design partners up with companies and organizations in their Designmatters program to sponsor student projects that will make a real impact on the world. ArtCenter College of Design #7. California College of the Arts: Oakland, CA Statistics Undergraduate enrollment: 1,486Acceptance rate: 64%Average GPA: Not reportedAverage SAT score: Not reportedAverage ACT score: Not reported Special Requirements First-year applicants are asked to submit 10 to 20 images of their best work as a portfolio sample. Notable Facts The faculty is comprised of leaders in various artistic fields, and one-on-one attention is common (average student-teacher ratio is 8:1). CCA includes a First Year Program that introduces students to studio practice and incorporates a portfolio review at the end of the year to assess students’ readiness for the majors. There is also a First Year Student Exhibition every year. CCA offers numerous resources for professional development and networking in the arts that will help students to start fulfilling careers. #8. School of Visual Arts: New York, NY Statistics Undergraduate enrollment: 3,752Acceptance rate: 72%Average GPA: 3.3Average SAT score: Not reportedAverage ACT score: Not reported Special Requirements You will need to submit a statement of intent describing why you’re pursuing undergraduate study in the visual arts. You must also submit images of 15-20 pieces of your best work for your portfolio. You can decide to submit a film reel instead if you’re interested in studying film. Notable Facts There are three galleries at SVA that present over 50 exhibitions every year, so students have frequent opportunities to show their work. SVA has an Internship for Credit program that allows students to work with top creative agencies in New York City. The Digital Imaging Center and Print Lab offers extensive technological resources to students studying graphic design and advertising or enrolled in classes at the Center. School of Visual Arts #9. Parsons the New School for Design: New York, NY Statistics Undergraduate enrollment: 6,695Acceptance rate: 51%Average GPA: 3.4Average SAT score: 1200Average ACT score: 26 Special Requirements Prospective applicants must complete the â€Å"Parsons Challenge,† an artistic project exploring something that is usually overlooked in their environment. See the admissions site for more details on this. (I kind of want to do it just for kicks!) Applicants must also submit a portfolio of 8-12 pieces of recent artwork and an artist’s statement. Notable Facts Parsons incorporates digital arts strongly into its undergraduate curriculum, particularly in first-year coursework. Parsons also has a special first-year study program that teaches students to think creatively across different disciplines. With its location at the center of the New York art scene, this is a great place for students to explore different methods of art-making and learn how to turn their creative passion into a career. Parsons The New School for Design #10. Massachusetts College of Art and Design: Boston, MA Statistics Undergraduate enrollment: 1,931Acceptance rate: 71%Average GPA: 3.4Average SAT score: 1170Average ACT score: 24 Special Requirements You must submit a portfolio with 15-20 examples of your strongest and most recent artwork. You will also need to include a statement of purpose that describes you as an artist. Notable Facts MassArt is the nation’s first independent public college of art and design. The college has seven on-campus gallery spaces, routinely featuring work from students, faculty, and visiting artists. Degrees are offered in a wide variety of disciplines, from Industrial Design to Animation to Art Education. Massachusetts College of Art and Design Which Art School Is the Best Choice for You? All of the schools on this list will give you a great education in the arts, but some of them might be better fits than others for you and your interests. Location is a big factor to consider in deciding on the right art school for you. A few of these schools are located in the heart of New York City, which might be an awesome place for some students but an overwhelming place for others. Learn more about the differences between colleges in urban and rural environments. You should also consider the program offerings of each school. The School of Visual Arts, for example, is a great place for film majors. Parsons is a great place for students who are interested in fashion and digital arts. If you're still not sure exactly what you want to study in the arts, you should choose a school that has a first-year general education program and a strong advising system like California College of the Arts. If you are sure of what you want to study, you might choose a school like Art Center College of Design, which allows students to begin working in their chosen major from day one without any general education requirements. Admissions statistics are important as well. If your grades aren't spectacular, you should look for a school where admission is granted mainly based on artistic talent and a lower GPA and test scores won't ruin your chances. Some of these schools can be very competitive, but if you present an impressive portfolio, you can expect to have a shot at admission. What's Next? If you're planning on going to art school, you'll need to create a portfolio of your best work. Learn more about how to make a great portfolio that will impress your dream school. Interested in studying film? Read our article on how to get into film school. Are you worried about how your test scores might affect your chances of attending college? This article will tell you when SAT and ACT scores don't matter in the admissions process. Want to improve your SAT score by 160 points or your ACT score by 4 points? We've written a guide for each test about the top 5 strategies you must be using to have a shot at improving your score. Download it for free now:

Western civ (Greeks Vs, Hebrews) Essay Example | Topics and Well Written Essays - 500 words

Western civ (Greeks Vs, Hebrews) - Essay Example Consequently, the Greek system prepared individuals to serve the state while the Hebrew system prepared individuals to serve God. There is little question that religion played an important part in the social lives of both civilizations but dogmatic religious practices are more readily associated with the Hebrew tradition. In similar fashion, the political realities of the day reflected the intrusion of religion into the affairs of the state. The Hebrews believed that God would hold everyone accountable one day so the ruler was expected to be accountable to God alone. In contrast, the Greek system of personal accountability relied on philosophy and on the discretion of fellow men. Hence, the Greek ruler was accountable to his fellow men more than his accountability to any gods. This increased accountability paved for the world’s first democracy in Athens (Blainey). The achievements of various Athenians such as Aeschylus, Sophocles, Euripides, Herodotus, Thucydides, Hippocrates, Socrates, Plato and Aristotle among others laid the foundation for the modern Western civilization. The move to democracy strengthened the Greek quest for knowledge. Furthermore, the Greeks had managed to disassociate divinity with exploration of things around them. Even after Athens was subsumed into the larger Greek civilization, the traditions of learning and development continued unabated. The epistemological drive of the Greeks led to developments in science, architecture, law, philosophy, commerce and numerous other fields. A rich scientific tradition can be traced back to the Greeks with names such as Archimedes, Hero of Alexandria, Galen and others appearing in scientific discussions to this day (Thornton). In contrast, the Hebrew tradition kept God intact with learning limitations. God was seen as the center of the universe in the literal sense and ideas upheld by the scripture were unquestionable. The strength of the Hebrew tradition of

Competing In The Global Arena Essay Example | Topics and Well Written Essays - 4250 words

Competing In The Global Arena - Essay Example Why is Apple holding so much cash Having too much cash in reserve might either mean that the company does not know yet how to allocate it or that they may have some risk concerns about future potential investment. Apple is obviously one of the handful of companies where the fortunes are seen to be intricately tied to the person in charge. The star excellence and the thinker talents linked by professionals Jobs are certainly contributed to the success of the company. So the news of Jobs' cancer surgery might lead to a succession problem and compromise the company's future. Apple achieved a solid performance for the first quarter of 2005 compared to the same quarter 2004 with strong net sales in the Americas segment (+77%) in Europe (+63%) and in Japan (+18%). The Americas segment represents approximately 47% of the company's total net sales. The increase in net sales in the Americas, Europe and Japan was primarily driven by increased demand of the iPod and the consumer-oriented iMAC (Apple Computer, Inc. (AAPL), 2006). Demand for the iBook products were especially high for the Americas, while peripherals and other hardware were more popular in Europe. The retail segment's net sales grew to $561 million as compared to $273 million in the same period in 2004, this represents a remarkable 105% increase. B. Strategic Posture Mission Apple strives for continuous improvement in our environmental, health and safety management systems and in the environmental quality of our products, processes and services (Environmental Health and Safety Policy Statement, 2006). Apple's Guiding Principles Meet or exceed all applicable environmental, health and safety requirements. Where laws and regulations do not provide adequate controls, Apple will adopt their own standards to protect human health and the environment (Apple and the Environment). Support and promote sound scientific principles and fiscally responsible public policy that enhance environmental quality, health and safety. Advocate the adoption of prudent environmental, health and safety principles and practices by their contractors, vendors and suppliers (Environmental Health and Safety Policy Statement, 2006). Communicate environmental, health and safety policies and programs to Apple employees and stakeholders. Design, manage and operate our facilities to maximize safety, promote energy efficiency and protect the environment. Strive to create products that are safe in their intended use, conserve energy and materials and prevent pollution throughout the product life cycle including design, manufacture, use and end-of-life management (Environmental Health and Safety Policy Statement, 2006). Ensure that all employees are aware of their role and responsibility to fulfill and sustain Apple's environmental, he

Broad Environment Essay Example for Free

Broad Environment Essay Knowing the Unknown about the Broad Environment University of Tampa MGT 431 Practical Strategic Assessment Dr. George Bud Wynn June 09, 2009 Abstract In â€Å"Foundations in Strategic Management†, pages 21 to 27, author Harrison discusses the influence that the external environment has on a particular company’s operations and how its managers can adapt to environmental uncertainties to sustain their competitive advantages. Harrison also points out why it is important for firm to analyze and evaluate its broad environment. He also mentions how managers can analyze and evaluate external forces and devise strategies to complement the rapid-changing environment in order for their company to be competitive throughout and take advantage of its strengths and minimize its threats. He further divides the broad environment into four sub-headings (socio-cultural, economical, technological and political/legal) and states why each is important and the effect each have on a company’s operations. The purpose of the paper focuses more on informing the reader of the importance of evaluating a particular company’s broad environment. The paper also includes a review of and my opinion on what I think firms and their managers should be aware of when it comes to their company’s broad environment. The Importance of the Broad Environment to Managers Before the 1990’s, if a business had a competitive advantage and opened its doors to the general public, it was almost guaranteed success. However, such cases no longer exist. In modern times, companies with competitive advantages such as sufficient resources, skilled workers, superior technologies and the like can still go under due to the ever-changing environment. Nowadays, successful businesses are shifting focus from just having a competitive advantage in one or two areas, to maximizing on the relevant information that its managers have about its operation environment; including the broad and task environment. In order to operate a successful business, it is important for managers to have a comprehensive understanding of its broad environment in which it plans to operate. The broad environment includes socio-cultural, economical, technological, and political/legal forces which have an effect on how the company plans to gain a profitable market share. Such comprehensive understanding allows managers to save valuable time and money; subsequently making their business profitable. Due to the uncertainties of the rapidly changing economy, it is almost required by top performing firms to research the broad environment; even if its plan to merge or joint venture with another firm elsewhere. In addition, such research is also highly recommended for companies that plan to do business globally; if the company wishes to create a buffer from potential losses. Also, companies that analyze the broad environment effectively are able to maximize its advantages and opportunities while limiting weaknesses and threats. In conclusion, successful firms must recognize the importance of the broad environment in order to take advantage of its strengths and opportunities while minimizing its weaknesses and threats. Well-defined researches coupled with a complete understanding of a company’s broad environment are always important because, when done properly, it can enable companies to seize potential market areas and dominate a particular geographical location. Maintaining a complete understanding of the broad environment is vital to a company’s success. Understanding the broad environment is important for many reasons. Socio-cultural forces occur randomly and without warning. Many firms experience difficulties with these forces many times during operations. Examples of socio-cultural forces range from the influence of terrorism on the economy to the legality of abortion. Proper socio-cultural assessment enables firms to minimize its threats from potential restrictive legislation. Firms which are aware of pending restrictive law changes can avoid huge fines and penalties. In addition, managers should spend ample time researching law changes in order to save their company from falling intothese traps. Managers who are aware of demographic and economic changes in society can take advantage of opportunities that their competition fails to recognize. For example, a careful study of a firm’s social environment can gather information on what products/services or lifestyles people from a particular neighborhood purchase or prefer. In conclusion, a thorough understanding of socio-cultural forces can enable managers to gain from their knowledge about its societal operations and make it work to the best interest of their business. This will enable them to take advantage of strengths while also minimizing their threats. Economic forces play a critical part in the understanding of a firm’s broad environment. Factors such as interest rates, economic growth and inflation are important variables which managers must be aware of in order to process their broad environment effectively. Without such knowledge, it would be almost impossible to run an effective and efficient business and establish a competitive advantage. Furthermore, information gained from economic forces enables managers to allocate resources while allowing time to seek other investment opportunities. For example, multinational firms can benefit from favorable exchange rates. In order words, an understanding of fluctuations in exchange rates can lead such firms to purchase raw materials in countries where their own currency is superior to that of the foreign country. On the other hand, without knowledge of inflation, companies can suffer huge losses when investing in these countries. As a result, managers must be aware of such economical changes beforehand in order to make educated decisions that can assist their company’s growth and production. Another broad environment which managers should be aware of is technology. Nowadays, technology is changing the ways individuals and firms do business. New innovations such as the internet, handheld computers, and direct satellite systems are making it much easier for firms to purchase, deliver, and sell its products/services. Firms must be aware of and adapt to new technological changes in order to stay ahead of its competition in the fight for market shares and profits. If not, these companies are bound to fail or file for bankruptcy. Most firms are pumping millions of dollars into research and development in order to find new ways of improving its product’s life cycle which will in turn, generate more revenue and satisfy customer. One of the world leaders in electronic supply, the Sony Corporation of America, has developed new ideas to save its customer time and money. As a result, Sony is one of the main leaders in its industry and continues to see profits soar in 2008. According to one official, one of its newest inventions, â€Å"Eye on Education†, â€Å"[e]ducation educators receive competitive pricing, exclusive service and support capabilities, financing options, and trade-in opportunities for Sony professional display products. † Technology awareness and continuous improvement in its research and department hasled the company to success over the years. In modern times, in order for any one company to be effective, managers must be aware of the technological forces that can assist their companies to save money, andtime; subsequently improving the business purpose and values. Finally, close attention must be geared towards political/legal forces which can change the company’s focus or purpose in one way or another. Government regulations can alter the ways in which companies wish to perform its business in terms of locally or globally. Therefore, managers must pay attention to different types of changes that their companies might undertake if there is a desire to join multiple or particular industries. Government normally provides advantages to some businesses in the form of tax incentives which promote ethical behavior and remind firms of its responsibilities. Managers who are vigilant can take advantage of these incentives. Overall, a comprehensive understanding of a company’s broad environment such as socio-cultural, economical, technological, and political/legal forces are an essential assessment that needs to be considered before a merger, joint venture, acquisition, or even to successfully run a business. On the other hand, trained personnel must carry out such researches in order to avoid huge losses and business failure. Also, integrated understanding coupled with awareness can provide managers with information on what types of products/services to offer, sell, customers, delivery, and the like to enable their business to accomplish its goals. Assessments are highly recommended for starting up and strugglingcompanies and businesses which wish to operate globally. If somehow a particular set of managers can make a reasonable assessment of its company’s broad environment, they are almost guaranteed to run an effective and efficient company.

The Effect of Concentration on the Rate of Reaction :: GCSE Chemistry Coursework Investigation

The effect of concentration on the rate of reaction between sodium thiosulphate and dilute hydrochloric acid This investigation is about rates of reaction and what affects them. In this case I am going to look at hydrochloric acid and sodium thiosulphate which is a precipitation reaction causing the solution to go 'cloudy'. They react as in the equations below: sodium thiosulphate + hydrochloric acid -> sodium chloride + sulphur + sulphur dioxide + water Na2S2O3(aq) + 2HCl(aq) -> 2NaCl(aq) + S(s) + SO2(g) + H2O(l) A reaction will only occur where the particles of the reactants meet and combine. This is called the collision theory. For a reaction to occur particles have to collide with each other. Only a small percent result in a reaction. This is due to the energy barrier to overcome. Only particles with enough energy to overcome the barrier will react after colliding. The minimum energy that a particle must have to overcome the barrier is called the activation energy, or Ea. The size of this activation energy is different for different reactions. If the frequency of collisions is increased the rate of reaction will increase. However the percent of successful collisions remains the same. An increase in the rate of reaction can be achieved by increasing the frequency of collisions. Therefore to increase the rate of reaction it is necessary to cause more particles to collide harder and collide more often. There are several ways to do this and these make up the factors for this experiment. They are listed below along with predictions as to their affect on the reaction. Possible Factors To make sure I carry out a fair test I will only change the concentration of sodium thiosulphate. I will keep the following factors the same. Increasing the pressure. By reducing the volume in which the same amount of particles exist the pressure is increased. Once the same number of particles are in a smaller area there is less space in which to move and so the particles are more likely to hit each other. It is therefore possible to predict that increasing the pressure will result in an increase in the rate of reaction. I will not test this variable because we don't have the facilities to test it. However pressure is a continuous variable. Catalyst. A catalyst is a separate substance that speeds up a reaction. After the reaction has happened it gets left behind. This makes this variable unsuitable for the type of experiment I am going to do. Temperature. By giving the particles extra energy they will move faster. This means that they cover more ground and are therefore more

Lab 5 Acid/Base Extractions Essay

The purpose of this experiment is to separate either the organic base (amine) or organic acid (carboxylic acid) from a mixture that contains inorganic impurities (salt) by performing a liquid-liquid extraction and then taking a melting point. Key Experimental Details and Observations Our starting material, Compound B, was a fine white powder and weighed 0.535g. The final product was a shiny white sheet that resembled acrylic paint and weighed 0.109g. Results Our percent yield was 0.109g/0.535g x 100 = 20.4%. Discussion and Conclusions The melting point ranges we got for compound B ranged from 110.8-114.0 Â °C, while the melting point range for benzoic acid is 121.0-123.0Â °C and 103.0-107.0Â °C for 4-amino acetophenone. Since the ranges we acquired for compound B are directly in between both acid and base melting points, we can conclude that the purity for compound B is relatively high due to the compound being made up of equal parts of benzoic acid and 4-amino acetophenone. Thus saying that our melting point ranges are fairly accurate because they exemplify an equal percentage of both compounds, which is exactly what compound B is made up of. The purity can also be concluded through the melting points depression because depression arises from impurities within the lattice of a crystalized sample. We acquired a percent yield of 20.4%, which is relatively low. This result could be from part of the compound B solution being left behind in the Erlenmeyer flask when pouring the solution into the vacuum filtrate. The efficiency of a liquid-liquid extraction is high because it did allow us to gain some of our starting product back. We were able to isolate the acid from the base by deprotonating the solution with 10mL of NaOH. This caused the benzoic acid to settle at the bottom of the separatory flask because the NaOH broke it into ions, which made the acid polar. We then protonated the solution by adding HCl, which cause the acid to separate from the solution.