Consider the reaction, Cl2 + H2S => 2 HCl + S, which is found to be first order in Cl2. Which step of the proposed mechanism must be slow in order to agree with this rate law?
Cl2 => Cl^+ +Cl^-
Cl^- + H2S => HCl + HS^-
Cl^+ HS^- => HCl +S
a) eiher 2 or 3 b) only 3 c) only 2 d) 1