Limiting Reactant Calculation Question  [ENDORSED]

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Summer de Vera 2C
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Joined: Fri Sep 28, 2018 12:16 am

Limiting Reactant Calculation Question

Postby Summer de Vera 2C » Mon Oct 01, 2018 1:17 pm

In one of the post-module assessment problems, I was asked to find the theoretical yield of a product using the limiting reactant and molar ratios. I found the limiting reactant to be 1.56 mols and the reactant–product molar ratio to be 4:5, so what would the next step be? Do I just multiply the 1.56 mols by 5?

Iris Bai 2K
Posts: 60
Joined: Fri Sep 28, 2018 12:18 am

Re: Limiting Reactant Calculation Question  [ENDORSED]

Postby Iris Bai 2K » Mon Oct 01, 2018 1:21 pm

You would multiply the 1.56 mol reactant by 4 mol product/5 mol reactant. This uses stoichiometry to convert the moles of reactant into moles of product.

Kelsey Warren 1I
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Joined: Fri Sep 28, 2018 12:15 am

Re: Limiting Reactant Calculation Question

Postby Kelsey Warren 1I » Mon Oct 01, 2018 4:37 pm

Another way to approach this is using dimensional analysis:

You have 1.56 mol reactant and you want to convert to mols of product, so multiply 1.56 mol reactant times (5 mol product/4 mol reactant). I think the last answer just got the 4:5 ratio flip flopped.


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