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Give the units of the rate constants in terms of the power x in. M^x time-1 for reactions with the following overall orders. a) first order. b) 5/2 order. I know the units for the first order are. Mol L^-1 / s = k(mol L-1). K = s^-1. but in terms of what the question is asking, the x , I don't understand what they want...
of a reaction is simply the sum of the exponents on the concentration terms for a rate law: Rate = k[A]x[B]y reaction order = x + y. Example 1: Rate = k [A]1[B]0 = k [A] is 1st order in [A] and 0th order in [B] and 1st order for the reaction. Example 2: Rate = k [A]3[B]0.5. is 3rd order in [A], half order in [B] and 3.5 order overall. What does the reaction order tell us: We need to know the order of a reaction because it tells us the. functional relationship between concentration and rate. It determines how the amount of a compound. speeds up or retards a reaction.