Question

3 I- (aq) +H3AsO4 (aq) + 2 H+ = I3- (aq) + H3AsO3 (aq) + H2O (l) is found to be first order with respect to each of the reactants. write the rate law. what is the over all order?

Answer 1

rate = k(I^-)(H3AsO4)(H^+)
Since the rate law is first order with respect to EACH reactant, then each exponent for each reactant is 1. The overall order is the sum of each or1+1+1 = 3 overall.

Answer 2

first order reaction