General Questions


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704709603
Posts: 92
Joined: Wed Sep 21, 2016 2:59 pm

General Questions

Postby 704709603 » Wed Feb 22, 2017 12:08 pm

How is order related to the mechanism? What is an example of when we would use the method from the course reader for multiple reactants that all change conc? What does it mean that a catalyst is saturated in a 0th order reaction?

Thanks!

Brianna Wummer 2L
Posts: 19
Joined: Wed Sep 21, 2016 2:56 pm

Re: General Questions

Postby Brianna Wummer 2L » Wed Feb 22, 2017 7:34 pm

Hi there! I can answer your third question, "what does it mean that a catalyst is saturated in a 0th order reaction." When a catalyst (or enzyme) is saturated, that means that every enzyme is catalyzing a reactant, or substrate. All enzymes are busy, none are free. So, adding more reactant/substrate does not increase the speed of the reaction, because all of the enzymes are already being used.
Adding more reactant doesn't affect the reaction rate for a saturated catalyst.

Since the enzymes in a zero order reaction are saturated, the differential rate law for a zero order reaction only depends on the rate constant, and not the concentration of the reactants. Hope that helps!

704709603
Posts: 92
Joined: Wed Sep 21, 2016 2:59 pm

Re: General Questions

Postby 704709603 » Fri Feb 24, 2017 8:51 am

Great! That makes sense! Thank you!


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