Textbook question 7.17

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

Textbook question 7.17

Postby Paige Lee 1A » Thu Mar 12, 2020 10:10 am

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
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Re: Textbook question 7.17

Postby Tanmay Singhal 1H » Thu Mar 12, 2020 11:03 am

the reaction rate is determined by the rate determining step

jisulee1C
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Re: Textbook question 7.17

Postby jisulee1C » Thu Mar 12, 2020 11:09 am

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
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Re: Textbook question 7.17

Postby Jessica Booth 2F » Thu Mar 12, 2020 4:38 pm

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
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Re: Textbook question 7.17

Postby Ayushi2011 » Sat Mar 14, 2020 2:49 pm

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


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