Which Step is Slower?


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lizzygaines1D
Posts: 52
Joined: Thu Jul 13, 2017 3:00 am

Which Step is Slower?

Postby lizzygaines1D » Mon Mar 05, 2018 1:15 pm

when going through reaction mechanisms, how can you determine which step is slower?

Ethan-Van To Dis2L
Posts: 50
Joined: Fri Sep 29, 2017 7:05 am

Re: Which Step is Slower?

Postby Ethan-Van To Dis2L » Mon Mar 05, 2018 1:17 pm

The slower step is which ever reaction shows the rate law.

Rana YT 2L
Posts: 49
Joined: Thu Jul 27, 2017 3:01 am

Re: Which Step is Slower?

Postby Rana YT 2L » Mon Mar 05, 2018 2:09 pm

The slow step is also the step with the largest activation energy

Jesse_torres2H
Posts: 41
Joined: Thu Jul 27, 2017 3:00 am

Re: Which Step is Slower?

Postby Jesse_torres2H » Mon Mar 05, 2018 2:13 pm

The slowest step in a reaction is the one with the higher activation energy.

Yutian Zhao -1J
Posts: 30
Joined: Fri Sep 29, 2017 7:05 am

Re: Which Step is Slower?

Postby Yutian Zhao -1J » Mon Mar 05, 2018 2:21 pm

As the slowest step always determines the overall reaction, find the elementary step whose rate law is the same as the overall reaction rate law, then that elementary step would be the slowest and be the rate determining step. Hope it helps.

aaron tang 2K
Posts: 49
Joined: Thu Jul 27, 2017 3:01 am

Re: Which Step is Slower?

Postby aaron tang 2K » Mon Mar 05, 2018 2:22 pm

You can determine the slowest step by the determination rate or the part of the graph that requires the most activation energy.

Mitch Mologne 1A
Posts: 74
Joined: Fri Sep 29, 2017 7:04 am

Re: Which Step is Slower?

Postby Mitch Mologne 1A » Mon Mar 05, 2018 2:29 pm

Many times, a problem will give you mechanisms, and in turn tell you explicitly which step is the slow mechanism.

Jennifer Ho 1K
Posts: 31
Joined: Thu Jul 13, 2017 3:00 am

Re: Which Step is Slower?

Postby Jennifer Ho 1K » Tue Mar 06, 2018 12:31 am

Usually the problem will tell you which step in the mechanism is the slow step, but if it asks for which step is slow, you just need to find which step matches the overall rate law.

lizzygaines1D
Posts: 52
Joined: Thu Jul 13, 2017 3:00 am

Re: Which Step is Slower?

Postby lizzygaines1D » Tue Mar 06, 2018 12:42 pm

Okay this clarifies so much. thank you!


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