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How do you determine the overall order of the reaction?
Rate = k * [I-]^a * [S2O8 2-]^b
k = Rate constant
a,b: Order of reaction
Now,
Rate 1 / Rate 4 = k * [0.08]^a * [0.04]^b / k * [0.04]^a * [0.04]^b
1.22*10^5 / 6.1*10^-6 = (0.08/0.04)^a
2 = 2^a
a = 1
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