Question

The reaction A + B → products is first order in each of the reactants

1) How does the rate of reaction change if the concentration of A is increased by factor 3?

2) What is the change in the rate of reaction if the concentration of A is halved and concentration of B is doubled?

Answer 1

1) The reaction, A + B → products

Rate = K[A]'[B]'

If conc. of A is increased by factor 3 then rate also increases 3 times.

2) If conc. of A is halved and concentration of B is doubled then rate remains unchanged