Consider the reaction,
`Cl_(2(aq))+H_2SrarrS_((s))+2H_((aq))^(+)+2Cl_((aq))^(-)`
the rate law for this reaction is rate = k[C12][H2S]. Which law mechanism is/are consistent with this rate equation?
`A." "Cl_2+H_2SrarrH^(+)+Cl^(-)+Cl^(+)+HS^(-)(slow)`
`Cl^(+)+HS^(-)rarrH^(+)Cl^(-)+S` (fast)
`B." "H_2ShArrrH^(+)+HS^(-)`(fast equilibrium)
`Cl_2+HS^(-)rarr2Cl^(-)+H^(+)+S` (slow)

Options

A. A only
B. B only
C. Both A and B
D. Neither A nor B

Answer

A

Explanation

The rate equation depends upon the rate determining step. The given rate equation is only consistent with the mechanism A.