ACS Exam General Chemistry Dynamics 21. Consider the reaction Cl2 (aq) + H2S (aq) — S (s) + 2H+ (aq)

ACS Exam General Chemistry Dynamics 21. Consider the reaction Cl2(aq) + H2S(aq) -- S(s) + 2H+(aq) + 2Cl-(aq) The rate equation for this reaction is rate=k[Cl2][H2S] Which of these mechanism is (or are) consistent with this rate equation? I. Cl2 + H2S -- H+ + Cl- + Cl+ + HS- (slow) Cl+ + HS- -- H+ + Cl- + S (fast) II. H2S == H+ + HS- (fast equlibrium) Cl2 + HS- -- 2Cl- + Cl- + S (slow) a. I only b. II only c. Both I and II d. Neither I or II Amarillo Science ACS Examination

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