AP Chemistry 5.7 A Identify the Components of a Reaction Mechanism Questions

Practise AP Chemistry 5.7 reaction-mechanism questions by identifying intermediates, catalysts and steps that reproduce the overall reaction.

Exam points

identify intermediates and catalysts by tracking species produced and consumed across mechanism steps
check that elementary steps add to the overall reaction and fit the energy profile

Answer the following questions about $\mathrm{C}_{2} \mathrm{H}_{4} \mathrm{O}$ .

In the reverse reaction, the conversion of compound Z to compound X is catalyzed in the presence of trace amounts of water. The catalyzed reaction is proposed to occur via the following two-step mechanism.

Step 1: $\mathrm{Z}+\mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{Y}$ (slow) Step 2: $\mathrm{Y} \rightarrow \mathrm{X}+\mathrm{H}_{2} \mathrm{O}$ (fast)

Identify the intermediate in the mechanism, if any.

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AP Chemistry 5.7 A Identify the Components of a Reaction Mechanism Questions question 1