Keeping the concentration of H2 fixed, doubling the concentration of ICl doubles the rate. Keeping the concentration of ICl fixed, doubling the concentration of H2 quadruples the rate. Hence, Rate = [H]^2[ICl] Solution Keeping the concentration of H2 fixed, doubling the concentration of ICl doubles the rate. Keeping the concentration of ICl fixed, doubling the concentration of H2 quadruples the rate. Hence, Rate = [H]^2[ICl].