Experiment 3

Question 1

S2O8^2-

Answer 1

Persulphate ion.

Question 2

S2O3^2-

Answer 2

Thiosulphate ion.

Question 3

Starch

Answer 3

Forms a blue complex with free iodine and provides a more accurate colour indicator.

Question 4

Clock Reaction

Answer 4

When the product of a slow reaction is the reactant of a faster reaction that allows one to determine the rate of the slower reaction.

Question 5

Ionic Strength

Answer 5

Impacts the rate constant proportionally.

Question 6

Experiment 3 Summary

Answer 6

1) Create the standardized solutions.
2) Run trials. Start of reaction is when the solutions are mixed together. End of reaction is when a blue colour first appears.