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An irreversible reaction A + B → products is monitored in buffered aqueous solution under conditionsKinetics Chemistry Question

Question

An irreversible reaction A + B → products is monitored in buffered aqueous solution under conditions where [B] >> [A] by measuring the concentration of A as a function of time. The decay of A is found to be first-order under these conditions, with the half-life for its disappearance varying as shown. What is the rate law for this reaction?

A.

Rate = k[A][B][H+]

✓ Correct
B.

Rate = k[A]/[B]

C.

Rate = k[A][H+]2/[B]

D.

Rate = k[A][B][H+]2

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