Write the differential equations for a consecutive first-order mechanism A → B → C with rate constants k1 and k2.

• A. d[A]/dt = -k1 [A]; d[B]/dt = k1 [A] - k2 [B]; d[C]/dt = k2 [B]
• B. d[A]/dt = -k1 [A] - k2 [A]; d[B]/dt = k1 [A] - k2 [B]; d[C]/dt = k2 [B]
• C. d[A]/dt = -k1 [A]; d[B]/dt = k1 [A] - k2 [B]; d[C]/dt = k2 [B]
• D. d[A]/dt = -k1 [A]; d[B]/dt = k1 [A] + k2 [B]; d[C]/dt = 0

Answer: (C)