limiting reagents

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Posts: 48
Joined: Fri Sep 28, 2018 12:24 am

limiting reagents

Postby duenezjuleny1D » Sat Dec 08, 2018 7:20 pm

how can we determine which reactant is the limiting reagent/determine percent yield?

Sona Hakobyan 3J
Posts: 45
Joined: Fri Sep 28, 2018 12:25 am

Re: limiting reagents

Postby Sona Hakobyan 3J » Sat Dec 08, 2018 7:24 pm

You determine limiting reactant by seeing which reactant will run out first in a reaction. Thus, you can figure this out by finding the mass of product each reactant produces. Whichever produces less of the product will therefore be the limiting reactant.

Percent yield= actual yield/theoretical yield * 100% The theoretical yield will be the mass of product which you solve for and the actual yield will likely be given to you.

Brandon Sanchez 3J
Posts: 30
Joined: Wed Oct 03, 2018 12:16 am

Re: limiting reagents

Postby Brandon Sanchez 3J » Sat Dec 08, 2018 8:51 pm

To find the limiting reagent, you convert the grams of one reactant to moles and do the same to the other and whichever one is lower is your limiting reagent. Percent yield is found by actual yield/theoretical yield x100%.

Kevin To 1B
Posts: 32
Joined: Sat Feb 02, 2019 12:15 am

Re: limiting reagents

Postby Kevin To 1B » Fri Jun 28, 2019 2:26 pm

Another method of determining the limiting reagent is to convert the mass of the reactants into moles using the molar mass. Choose one of the products and multiply the moles of reactants calculated by the mole ratio of [mole of that one product]/[mole of the respective reactant]. Whichever reactant produces the least moles of that one product is the limiting reagent.

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Joined: Fri Sep 28, 2018 12:22 am

Re: limiting reagents

Postby jlinwashington1B » Fri Jun 28, 2019 9:08 pm

Why would you just choose one of the products?

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