The Rate of Chemical Reactions

The Rate of Chemical Reactions - record the time on the Lab...

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The Rate of Chemical Reactions Purpose: The purpose of experiment 14, is to use the initial rate method to determine the oxidation of an iodide ion by a persulfate ion in an aqueous solution. Procedure: 1.) Practice transferring solutions and mixing them as they are transferred. 2.) Fill four burets. A with .2M KI, B with .2M KCl, C with .1M K 2 S 2 O 8 , and D with .1M Na 2 SO 4 . 3.) Prepare Run 1 solutions. Rinse 2 50mL Erlenmeyer flasks with DI water and drain. Deliver 20mL of solution from buret A, and label with an A. deliver 20mL of solution from buret B into second flask and label with a B. 4.) Rinse and drain a 250mL beaker and pipet solution D into the beaker. Add five drops of starch indicator. 5.) Arrange watch near beaker. Pour two solutions together and swirl. Time the reaction and
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Unformatted text preview: record the time on the Lab Sheet, until the solution turns blue. 6.) Repeat Run 1 if time permits. The times should be within 2 seconds of each other. 7.) Repeat steps 3 through 5 for Runs 2 through 7. 8.) Read the temperatures of solutions throughout the lab and record the average temperature. Chemicals: Potassium Iodide, KI Potassium Persulfate, K 2 S 2 O 8 (Or (NH 4 ) 2 S 2 O 8 , Ammonium Peroxydisulfate) Sodium Thiosulfate, Na 2 S 2 O 3 Potassium Chloride, KCl Sodium Sulfate Na 2 SO 4 Iodine, I 2 (formed) Starch Indicator Chemical Reactions: 2I-+ S 2 O 8 2-h I 2 + 2SO 4 2- I 2 + 2S 2 O 3 2-h 2I-+ S 4 O 6 2-Equations: Rate = -At ( )= Rate Initial kA0a B0b = Rate kAa Bb...
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This lab report was uploaded on 04/07/2008 for the course CHEM 1114 taught by Professor Prof.adams during the Spring '08 term at SMU.

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The Rate of Chemical Reactions - record the time on the Lab...

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