Compound Rate constant (minutes-1) Chloroform 7.13x10-10 Trichloroethane 1.24x10-6 Pentachloroethane 1.31x10-4 a. Based on the units of the rate constants, what order are the hydrolysis reactions? B. Calculate the half-lives in years for the hydrolysis of these pollutants. C. For which of the three compounds is hydrolysis of any importance in the environment?