1. The problem statement, all variables and given/known data The proposed mechanism for a reaction is Cl2 => 2 Cl (Fast) Cl + H2S => HCl + HS (Slow) Cl + HS => HCl + S (Fast) Which of the following would be a rate law for the reaction? 3. The attempt at a solution From other questions I've done the rate law for the reaction is always the slow step or rate-determining step. My answer was; k[Cl-][H2S] But the answer is k[Cl2]1/2[H2S] I don't really understand how they got that answer. Any help would be appreciated!