The following can be said about the reaction profile of an SN1 reaction:
I. The rate determining step is formation of carbocation.
II. The reaction profile has one transition state.
III. The slow step is the first transition state.
IV. The second step is attack of electrophile on carbocation.
V.The reaction proceeds in a polar aprotic solvent.

Question

The following can be said about the reaction profile of an SN1 reaction: 
I. The rate determining step is formation of carbocation.
II. The reaction profile has one transition state.
III. The slow step is the first transition state.
IV. The second step is attack of electrophile on carbocation.
V.The reaction proceeds in a polar aprotic solvent.

Quizplus · Accepted Answer

I. This is true because the formation of carbocation is the slowest step and therefore is the rate-determining step.
II. This is false. SN1 reactions have two transition states: one between the starting material and the carbocation intermediate, and one between the carbocation intermediate and the final product.
III. This is true because the slow step is the rate-determining step, which is the formation of the carbocation intermediate.
IV. This is true because the second step of the reaction is the attack of the nucleophile on the carbocation intermediate.
V. This is not necessarily true. SN1 reactions can occur in both polar protic and polar aprotic solvents.

The Following Can Be Said About the Reaction Profile of an SN1