Assume the following proposed reaction mechanism is correct. Cl 2 --> 2Cl (slow)

Question

Assume the following proposed reaction mechanism is correct.

Cl2 --> 2Cl (slow) (1)

H2 + Cl -->  HCl + H (fast) (2)

H + Cl --> HCl (fast) (3)

a. write the overall balanced equation for the reaction described by this mechanism.

b. what is the rate law of the overall reaction consistent with this mechanism?

c. how would the rate of the reaction be affected if the initial concentration of Cl2 is doubled?

d. how would the rate of the reaction be affected if the initial concentration of H2 is doubled?

e. What is the molecularity of step 3?

Explanation / Answer

a) H2 + Cl2 --> 2HCl

b) rate = k[Cl2]

c) The rate would double

d) The rate would unaffected

e) bimolecular

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