A reaction is first order in `A` secod order in `B`:
(i) write differential rate equation.
(ii) How is the rate affected when the concentration of `B` is tripled ?
(iii) How is the rate affected when the concentration of both `A` and `B` is doubled?

Explanation

(i) Rate`=(dx)/(dt)=K[A]^(1)[B]^(2)`
(ii) `r_(0)=K[A]^(1)[B]^(2)`
`r_(1)=K[A]^(1)[3B]^(2)`
`:. r_(1)=9xxr_(0)`
(iii) `r_(0)=K[A]^(1)[B]^(2)`
`r_(2)=K[2A]^(1)[2B]^(2)`
`r_(2)=8xxr_(0)`