Limiting Reactant Question

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Limiting Reactant Question

Postby Megan_Ervin_1F » Wed Oct 03, 2018 12:28 pm

So, in the problems so far we have only had 1 limiting reactant. I think it is unlikely to have more than 1 limiting reactant. However, if there is an equation with 3 reactants, then can there be 2 limiting reactants?

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Re: Limiting Reactant Question

Postby madisondesilva1c » Wed Oct 03, 2018 12:35 pm

I think potentially there could be a situation where two of the reactants may "run out" faster than the third, but out of these two, there would likely be a reactant that is "more limiting" in a sense that one reactant will still run out first. Therefore, you would continue the problem and treat the given reactant as the limiting reactant that will determine the amount of the product of the chemical reaction given the amount of the limiting reactant that runs out first.

Andonios Karas 4H
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Re: Limiting Reactant Question

Postby Andonios Karas 4H » Wed Oct 03, 2018 3:46 pm

While this likely won't appear in a practice problem, there could be multiple limiting reactants in a chemical reaction with more than two reactants. In this rare case, just choose one of the limiting reactants for calculating moles of product because they will provide the same answer. Also, if you are ever unsure of the limiting reactant, you can calculate the mass of the product treating each reactant as the limiting reactant. Whichever one produces the smallest amount of product will be the limiting reactant.

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