. Distinguish between rate expression and rate constant of a reaction

Best Answer

Rate expression is an experimentally determined expression which relates the rate of reaction with the concentration of the reactants whereas rate constant is the rate of reaction when concentration of each reactant in the reaction is unity

Consider a general reaction

The rate expression for this reaction is

                Rate = k [A]^m [B]ⁿ

Where the proportionality constant k is called rate constant