Stoichiometric coefficients


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Rebecca Doan 2L
Posts: 51
Joined: Thu Jul 27, 2017 3:01 am

Stoichiometric coefficients

Postby Rebecca Doan 2L » Sat Mar 17, 2018 7:30 pm

Are stoichiometric coefficients used for elementary reactions? In the book, it states that they are not. However, in lecture, Lavelle has provided examples where there are coefficients in the elementary reactions of a mechanism.

Scott Chin_1E
Posts: 55
Joined: Sat Jul 22, 2017 3:00 am

Re: Stoichiometric coefficients

Postby Scott Chin_1E » Sat Mar 17, 2018 10:45 pm

I think the stoichiometric coefficients are there to help us determine the rate law of the elementary step. It would give us the order of the reactant in the rate law.

Sarah Maraach 2K
Posts: 31
Joined: Thu Jul 27, 2017 3:00 am

Re: Stoichiometric coefficients

Postby Sarah Maraach 2K » Sun Mar 18, 2018 9:21 am

Yes, stoichiometric coefficients are used in the elementary steps' rate laws, but you can't use it for the overall rate law as the coefficients may not align with the order.

Phillip Tran
Posts: 54
Joined: Thu Jul 13, 2017 3:00 am

Re: Stoichiometric coefficients

Postby Phillip Tran » Sun Mar 18, 2018 5:23 pm

only for elementary steps

sallina_yehdego 2E
Posts: 75
Joined: Sun Apr 29, 2018 3:00 am

Re: Stoichiometric coefficients

Postby sallina_yehdego 2E » Sun Mar 03, 2019 3:29 pm

Yes, they are used for elementary step rate laws, but always keep in mind you cannot use it when you're trying to solve for the rate law of the overall reaction because the coefficients may not always line up.


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