The effect of changing the concentration of reactants on the rate of a chemical reaction can be described by the rate law, which is an equation that relates the rate of a reaction to the concentrations of the reactants. The rate law is generally expressed as:Rate = k[A]^m[B]^nwhere Rate is the reaction rate, k is the rate constant, [A] and [B] are the concentrations of reactants A and B, and m and n are the reaction orders with respect to A and B, respectively.The reaction orders m and n determine how the rate of the reaction is affected by changes in the concentrations of the reactants. For example, if the reaction is first-order with respect to reactant A m = 1 , then doubling the concentration of A will double the reaction rate. If the reaction is second-order with respect to A m = 2 , then doubling the concentration of A will quadruple increase by a factor of 4 the reaction rate. If the reaction is zero-order with respect to A m = 0 , then changing the concentration of A will have no effect on the reaction rate.To determine the specific effect of doubling the concentration of one of the reactants on the reaction rate, you would need to know the reaction orders m and n for that particular reaction. These values can be determined experimentally or, in some cases, can be predicted based on the reaction mechanism.