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Consider the reaction 2xy2+z2⇌2xy2z which has a rate law of rate= k[xy2][z2] select a possible mechanism for the reaction.

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Answer is:
Step 1: XY₂+ Z₂ → XY₂Z + Z (slow).
Step 2: XY₂+ Z → XY₂Z (fast).
Overall reaction: step 1 + step 2:
XY₂+ Z₂ + XY₂+ Z ⇌ XY₂Z + Z + XY₂Z.
2XY₂+Z₂ ⇌ 2XY₂Z.
The sum of the two elementary steps is equivalent to the stoichiometric equation. Rate of chemical reaction depends on slow step (step 1).

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