Consider the reaction: Cl _ 2 ( aq )+ H _ 2 5( aq ) 5(5)+2 H ^ + ( aq )+2 Cl ^ - ( aq )…

Chemistry · JEE Main · NTA ExamsChemical Kinetics

Consider the reaction:

\(\mathrm{Cl}_{2}(\mathrm{aq})+\mathrm{H}_{2} 5(\mathrm{aq}) \longrightarrow 5(5)+2 \mathrm{H}^{+}(\mathrm{aq})+2 \mathrm{Cl}^{-}(\mathrm{aq})\)

The rate equation for this reaction is:

Rate = k [Cl2] [H2S]

Which of these mechanisms is/are consistent with this rate equation?

(A) Cl2 + H2S → H+ + Cl- + Cl+ + HS(slow)

      Cl+ + HS- → H+ + Cl- + S (fast)

(B) H2S ⇌H+ HS- (fast equilibrium)

      Cl2 + HS- → 2Cl- + H+ + S (slow)

  1. (B) only
  2. Both (A) and (b)
  3. Neither (A) nor (B)
  4. (A) only

Answer

(B) Both (A) and (b)

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