## Textbook question 7.17

Paige Lee 1A
Posts: 136
Joined: Sat Sep 07, 2019 12:16 am

### Textbook question 7.17

For part E, could someone please explain why adding a catalyst to accelerate the 3rd step only would have no effect on overall reaction rate?

Refer to the illustration below for the reaction A S D. (a) How many steps does this reaction have? (b) Which is the rate- determining step in this reaction? (c) Which step is the fastest? (d) How many intermediates must form in the reaction? (e) A catalyst is added that accelerates the third step only. What effect, if any, will the catalyst have on the rate of the overall reaction?

Tanmay Singhal 1H
Posts: 143
Joined: Sat Jul 20, 2019 12:16 am

### Re: Textbook question 7.17

the reaction rate is determined by the rate determining step

jisulee1C
Posts: 149
Joined: Thu Jul 25, 2019 12:17 am

### Re: Textbook question 7.17

The third step when looking at the illustration is doesn't take a lot of potential energy and therefore is one of the fast steps. However, since the overall reaction rate depends on the slow step as the rate-determining step, since adding a catalyst to accelerate third step doesn't accelerate the slow step of the reaction, it will not change the rate of the overall reaction.

Jessica Booth 2F
Posts: 101
Joined: Fri Aug 30, 2019 12:18 am

### Re: Textbook question 7.17

Since the slow step is the rate-determining step, if the catalyst doesn't accelerate the slow step, then the rate of the reaction won't change.

Ayushi2011
Posts: 101
Joined: Wed Feb 27, 2019 12:17 am

### Re: Textbook question 7.17

The slowest step is the rate determining step, if the catalyst doesn't affect this step, the rate of reaction doesn't change.