Which of the following rate laws is consistent with the following mechanism
A(g) + B(g) ⇌ AB(g) fast equilibrium (K_c1)
AB(g) + C(g) $\rarr$ AC(g) + B(g) slow

Question

Which of the following rate laws is consistent with the following mechanism A(g) + B(g) ⇌ AB(g) fast equilibrium (K_c1) AB(g) + C(g) $\rarr$ AC(g) + B(g) slow

Quizplus · Accepted Answer

The rate law is determined by the slow step of the mechanism, which involves AB and C. However, since AB is an intermediate formed in a fast pre-equilibrium with A and B, its concentration can be expressed in terms of A and B using the equilibrium constant (K_c1). Therefore, the rate law incorporates the concentrations of A, B, and C, adjusted by the equilibrium constant for the formation of AB from A and B.

Which of the Following Rate Laws Is Consistent with the Following