IodineClockReaction

IodineClockReaction - 1 2 3 4 5 Conclusions: 1. What effect...

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CHEMISTRY LAB Lab: Starch-Iodine Clock Reaction Names: ________________________ ________________________ ________________________ ________________________ Problem: How will temperature and concentration affect the rate of reaction between starch and iodine? Hypothesis: Experiment: Materials: 5 test tubes test tube rack graduated cylinder iodine starch solution warm water bath ice bath Procedure:: 1. label 5 test tubes with the numbers 1 through 5 and place them in a test tube rack. 2. Place 10 mL of starch-containing solution in each of the five test tubes. 3. Place tube 4 in an ice bath and tube 5 in a water bath at 35 º C. Leave them there for at least ten minutes. 4. Add the following amounts of iodine-producing solution to the indicated test tubes, stir carefully with a clean stirring rod, and record the time it takes for the blue color to appear. a. 10 mL to tube 1 b. 5 mL to tube 2 c. 20 mL to tube 3 d. 10 mL to tube 4 e. 10 mL to tube 5 5. Summarize your results in the table below. Data: Test Tube # Seconds for Color to Appear
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Unformatted text preview: 1 2 3 4 5 Conclusions: 1. What effect does changing the amount, and therefore the concentration, of a reactant have on the rate of reaction? _____________________________________________________ _____________________________________________________________________ ___ _____________________________________________________________________ ___ 2. What effect does lowering the temperature have on the rate of reaction? Why? _________ _____________________________________________________________________ ___ _____________________________________________________________________ _____________________________________________________________________ ______ 3. What effect does raising the temperature have on the rate of reaction? Why? ___________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _________...
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This note was uploaded on 11/09/2011 for the course CHEM 100 taught by Professor Sdfsdf during the Winter '08 term at BYU.

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IodineClockReaction - 1 2 3 4 5 Conclusions: 1. What effect...

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