Exhibit 13-18 Consider the Two-Step Mechanism Below That Has Been

question 39

Multiple Choice

Exhibit 13-18 Consider the two-step mechanism below that has been proposed for the gas phase reaction of H₂ with ICl to produce I₂ and HCl to answer the following problem(s) .
Step 1:
H₂ (g) + ICl (g) →HI (g) + HCl (g) (slow step)
Step 2:
HI (g) + ICl (g) →I₂ (g) + HCl (g) (fast step) Net reaction:
H₂ (g) + 2 ICl (g) →I₂ (g) + 2 HCl
-Refer to Exhibit 13-18. Assuming the mechanism above is consistent with experimental data, what is a reasonable rate law for the net overall reaction?

• A) Rate = k [H₂][ICl]
• B) Rate = k [HI][ICl]
• C) Rate = k [H₂][ICl]²
• D) Rate = k [H₂][ICl][HI]

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