For the reaction A + B to products , it is observed that : (i) On doubling the initial concentration of A only , the rate of reaction is also doubled and (ii) On doubling the intial concentration of both A and B , there is a change by a factor of 8 in the rate of the reaction The rate of this reaction is given by

For the reaction A + B to products , it is observed that : (i) On dou

1.	For the reaction A + B to products , it is observed that : (i) On doubling the initial concentration of A only , the rate of reaction is also doubled and (ii) On doubling the intial concentration of both A and B , there is a change by a factor of 8 in the rate of the reaction The rate of this reaction is given by
Answer» Rate = `k [A]^(2) [B]` Rate = ` k [A] [B]^(2)` Rate = k `[A]^(2) [B]^(2)` Rate = `k [A] [B]` Solution :When concentration A is doubled , rate is doubled . Hence order with respect to A is one. When concentration of both A and B are doubled , rate INCREASED by 8 TIMES hence TOTAL order is 3 . `THEREFORE`Rate = k `[A]^(1) [B]^(2)` Order = 1 + 2 = 3 .