## Slow step vs. fast step

$K = \frac{k_{forward}}{k_{reverse}}$

Selena Yu 1H
Posts: 108
Joined: Fri Aug 09, 2019 12:16 am
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### Slow step vs. fast step

How can determine which step is a slow step or fast step? What does fast step of a reaction mean?

Sydney Myers 4I
Posts: 100
Joined: Fri Aug 09, 2019 12:17 am

### Re: Slow step vs. fast step

Often, you can see which step of a reaction is slow by looking at its rate law. If there is a certain reactant in the rate law, you can tell that reactant is involved in the slow step of the reaction because it is the slow step that determines the rate. Whatever isn't involved in the rate is most likely part of the fast step.

Lauren Tanaka 1A
Posts: 109
Joined: Sat Aug 17, 2019 12:18 am

### Re: Slow step vs. fast step

I think it will usually tell you which one is the slow step and the fast step when calculating. Another way to find out is by looking at the rate law and if there is a particular reactant in that law that is the same in one of the reactants of the steps then you can find out which is the slow step. This is because the rate is determined by the slow step.

Sydney Pell 2E
Posts: 100
Joined: Wed Sep 11, 2019 12:17 am

### Re: Slow step vs. fast step

Why aren't the fast steps also factored into the overall reaction rate law?