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### Slow vs Fast Step

Posted: Mon Mar 11, 2019 6:14 pm
How do you tell which step in a multistep reaction is the slow step? Would we be given this information or is there a way to tell by the step itself? I am having trouble figuring out which step is the rate limiting step.

### Re: Slow vs Fast Step

Posted: Mon Mar 11, 2019 6:34 pm
Normally the problem will either tell you which step is the slow, rate determining step, or it will give you the reaction mechanism and the overall rate law for the reaction and you would have to determine from this information which step is the slow step.

### Re: Slow vs Fast Step

Posted: Tue Mar 12, 2019 4:54 pm
The slow step is always the rate determining step. So the rate of this step will be the overall rate.

### Re: Slow vs Fast Step

Posted: Tue Mar 12, 2019 5:04 pm
If the slow step is the not first step and contains and intermediate, you can assume the first step is at equilibrium and use the pre-equilibrium approach.

### Re: Slow vs Fast Step

Posted: Tue Mar 12, 2019 5:24 pm
the slow step usually has the same rate as the observed rate