A reaction is first order in A and second order in B
(i) Write the differential rate equation.
(ii) How is the rate affected on increasing the concentation of B three times ?
(iii) How is the rate affected when the concentration of both A and B are doubled ?

Explanation

A+B = Product
When the concentration of B is tripled
`r= k[A][3B]^(2)= 9k[A][B]^(2)`
`:.` Rate becomes 9 times.