Consider a hypothetical reaction between a, b, and c that is first order in a, zero order in b, and second order in c.
(a) write the rate law for the reaction.
(b) how does the rate change when [a] is doubled and the other reactant concentra- tions are held constant

(a) Rate = k[A][C]²

(b) If [A] is doubled, then the rate of reaction will be doubled as well.

Explanation:

(a) The rate is equal to the multiplication of a constant and the concentrations of all reactants, each to the power of their order.

Rate = k[A]¹[B]⁰[C]² = k[A][C]²

(b) Looking at the previous equation we can see that if [A] is doubled, then the rate of reaction will be doubled as well.