Chemistry (Le Chateliers Principle) II

Chemistry (Le Chateliers Principle) II - LE CHATELIER S...

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L E C HATELIER S P RINCIPLE D ISTURBING E QUILIBRIA :- L E C HATELIER S P RINCIPLE Experiment partner(s) : Aim: To observe and explain the different effects that a change in conditions have on a
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system that is in equilibrium by using Le Chatelier‘s principle. Hypothesis: If a system is in equilibrium and stress is applied to it, the equilibrium will counteract the change by shifting its position to attain equilibrium once again. As the temperature is decreased, the equilibrium will shift to the right as to produce heat during the reaction. As the temperature is increased, the equilibrium will favour the reactants so to absorb the heat applied. As the concentration of the reactant is increased, equilibrium will favour the products as the increase in reactants will produce more products. Apparatus: Refer to Appendix 1 Procedure: Part A. Effect of Temperature on Physical Equilibrium 1. 2 -3ml of saturated potassium nitrate solution was added to a clean test tube. 2. One crystal of potassium nitrate was added to the saturated potassium nitrate solution in the test tube. 3. The test tube was placed in a beaker of ice and water for 10 minutes, all results and observations were recorded after the 10 minutes. 4. The test tube was removed after 10 minutes and placed in a test tube rack to warm to room temperature, all results and observations were noted. Part B. Common Ion Effect on a Chemical Equilibrium 1. 50ml of distilled water was measured and poured into a 100ml beaker. 2. 1ml of 0.1M iron (lll) chloride (FeCl 3 ), and 1ml of 0.1M potassium thiocyanate (KSCN) was added to the 100ml beaker. 3. Solution was stirred. 4. Observations were recorded. 5. 5ml off the solution was then added to each of four test tubes (each was numbered from 1 - 4). 6. The test tubes were placed in front of a white background. 7. In test tube 2, 20 drops of 0.1M iron (lll) chloride was added. 8.
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This note was uploaded on 10/18/2010 for the course CRE 16002 taught by Professor Harmon during the Spring '10 term at Creative Studies.

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Chemistry (Le Chateliers Principle) II - LE CHATELIER S...

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