State the effect that each of the following changes has on the reaction rate in this experiment --increase, decrease, or no effect. (Assume no volume change for any of the concentration changes)

a. An increase in the H₂O₂ concentration. Explain

b. An increase in the volume of water in solution A. Explain

c. An increase in the Na₂S₂O₃ concentration. Explain.

d. The substitution of a 0.5% starch solution for one at 0.2%. Explain.