Which two trials should be compared to determine the order with respect to peroxide?
When the concentration of the KI was doubled (but the concentration of the peroxide remained the same), the rate for the reaction doubled. What is the order with respect to [KI]?
What is the overall order for the reaction?
Using the information provided from trial #1 and what you can determine about the order with respect to each reactant, determine the value for the specific rate constant for the reaction.