CHM 2046L Lab Report #11

CHM 2046L Lab Report #11 - Reaction Reversibility and Le...

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Reaction Reversibility and Le Chatelier’s Principle Brett Larose Coworker: Adam CHM 2046L Section # 19 4/15/2009 Objectives
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The main purpose of this experiment is to observe reaction reversibility. Another objective is to study a number of chemical reactions at equilibrium, as well as observing and understanding the shift in equilibrium in response to changes in temperature or changes in concentration of reactants or products. Materials/Equipment Disposable pipette Test tubes Hot plate 400-mL beaker 125-mL Erlenmeyer flask Chemicals Used De-ionized water (DI ) KCN 6 M NaOH 3 M 1 M 6 M HCl
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0.1 M 1 M 1 M 0.15 M (dissolved in methanol) 12 M HCl 0.1 M 0.1 M KSCN 1% Methyl Orange 0.1% Phenolphthalein Procedure For Part 1 of the experiment, 2 mL of 1 M was transferred into a small, clean test tube. Several drops of 3 M were added and the solution was mixed by shaking the test tube. Any observations were recorded. After, several drops of 6 M NaOH were added until a change was observed, and the change was recorded. Several drops of 3 M were then added until a change was observed. Several drops of 6 M NaOH were then added until a change was observed. For Part 2 of the experiment, 3 mL of DI water was transferred into a small, clean test tube. A drop of 1% methyl orange was added, followed by 2 drops of 6 M HCl. Any color change observed was recorded. 4 drops of 6 M NaOH were then added, with any observations being recorded. This same procedure was then followed, except replacing 1% methyl orange with 0.1% phenolphthalein. Afterwards, two small test tubes were cleaned. 2 mL of 0.1 M was transferred into each test tube. A drop of methyl orange was added to each sample. In one of the test tubes, 1 M was added—a few drops at a time. The solution was mixed and the color was compared to the color of the solution in
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the other test tube. Observations were recorded. Afterwards, a few drops of 1 M were added to each
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This note was uploaded on 04/15/2010 for the course CHM 2046 taught by Professor Dixon during the Spring '08 term at University of Central Florida.

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CHM 2046L Lab Report #11 - Reaction Reversibility and Le...

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