Mechanism 1 X_2 rightarrow 2X (slow) X + Y_2 rightarrow XY_2 (fast) X + XY_2 rig

Question

Mechanism 1 X_2 rightarrow 2X (slow) X + Y_2 rightarrow XY_2 (fast) X + XY_2 rightarrow X_2Y_2 (fast) Mechanism 2 X_2 rightarrow 2X (slow) X + Y_2 rightarrow XY + Y (fast) X + XY rightarrow X_2Y (fast) X_2Y + Y rightarrow X_2Y_2 (fast) Based on the information above, which of the following is true? a. Only mechanism 1 is consistent with the rate law b. Only mechanism 2 is consistent with the rate law c. Both mechanisms are consistent with the rate law d. Neither mechanism 1 or 2 is consistent with the rate law

Explanation / Answer

The rate law will depend upon the slowest step in the reaction mechanism.

In the given case the slowest step is same for two mechanisms.

Therefore both mechanisms are consistent with the rate law.

So option (c) is correct.

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