Hypothesis
If the speed at which the mixture is stirred is increased and the temperature at which the mixture is held is raised, then the reaction will take place at a higher rate, because the kinetic energy of the particles in the liquid will increase the number of successful collisions and accelerate the reaction.
Materials
Stopwatch
Video camera
18 beakers
Magnetic stirrer
6 magnetic stirrer bars
Hot plate
6 graduated cylinders
Fume Hood
Briggs-Rauscher Color Oscillation Reaction:
Solution A:
64.5 g potassium iodate
6.75 mL sulfuric acid
Dilute to 1.5 L with distilled water
Solution B:
23.4 g malonic acid
5.1 g maganese sulfate monohydrate
6 g vitex starch
Dilute to 1.5 L with distilled water
Solution C:
600 mL hydrogen peroxide
Dilute to 1.5 L with distilled water
Iodine Clock Reaction:
Video camera
18 beakers
Magnetic stirrer
6 magnetic stirrer bars
Hot plate
6 graduated cylinders
Fume Hood
Briggs-Rauscher Color Oscillation Reaction:
Solution A:
64.5 g potassium iodate
6.75 mL sulfuric acid
Dilute to 1.5 L with distilled water
Solution B:
23.4 g malonic acid
5.1 g maganese sulfate monohydrate
6 g vitex starch
Dilute to 1.5 L with distilled water
Solution C:
600 mL hydrogen peroxide
Dilute to 1.5 L with distilled water
Iodine Clock Reaction:
Procedure
Control
1. Pour Mixtures A, B, and C into beaker
2. Measure time to end of fifth oscillation
3. Repeat
Agitation of Reaction
1. Pour Mixture A into beaker
2. Pour Mixture B into beaker
3. Turn stirrer on to 65 rpm
4. Pour Mixture C into beaker
5. Measure time to the end of the fifth oscillation
6. Repeat
Temperature of Reaction
1. Pour Mixture A and C into beaker
2. Heat mixture B to 70 degrees Celsius
3. Pour Mixtures A and C into mixture B
4. Measure time to end of fifth oscillation
5. Repeat
1. Pour Mixtures A, B, and C into beaker
2. Measure time to end of fifth oscillation
3. Repeat
Agitation of Reaction
1. Pour Mixture A into beaker
2. Pour Mixture B into beaker
3. Turn stirrer on to 65 rpm
4. Pour Mixture C into beaker
5. Measure time to the end of the fifth oscillation
6. Repeat
Temperature of Reaction
1. Pour Mixture A and C into beaker
2. Heat mixture B to 70 degrees Celsius
3. Pour Mixtures A and C into mixture B
4. Measure time to end of fifth oscillation
5. Repeat