CHEMISTRY · Single correct · A Level · Chemistry · Rate equations · Rate equations
Problem
Consider the following mechanism, in which Steps 1 and 2 are rapid and reversible and Step 3 is slow.
Step 1 X + Y ⇌ Z (fast) K₁
Step 2 Z + Y ⇌ W (fast) K₂
Step 3 W → products (slow) kₛ
Which rate law is most consistent with this mechanism?
(a) rate=ksK1K2[X]2[Y]
(b) rate=ks[X][Y]2
(c) rate=ksK1K2[X][Y]2
(d) rate=ksK1[X][Y]2