Which is limiting?

Chemistry Level 2

Consider the following balanced chemical reaction:

2 A + 5 B 3 C . 2A + 5B \rightarrow 3C.

If 6 6 moles of A A react with 8 8 moles of B , B, then how many moles of C C is formed at maximum?


The answer is 4.8.

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1 solution

Ashish Menon
Apr 23, 2016

2 A + 5 B 3 C 2A + 5B \rightarrow 3C
First of all, we would have to find which reactant is limiting which can be found out by comparing the ratios of the number of moles given to the stoichiometry coefficient to both the reactants. The one with the least magnitude is limiting.

For B, ratio = 8 5 = 1.6 \dfrac{8}{5} = 1.6
For A, ratio = 6 3 = 2 \dfrac{6}{3} = 2
So, B is limiting.

5 5 moles of B produces 3 3 moles of C.
So, 8 8 moles of B would produce 3 × 8 5 = 4.8 \dfrac{3 × 8}{5} = \boxed{4.8} moles of C at maximum.

Yup. The same thing.

Abhiram Rao - 5 years, 1 month ago

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Great :+1: ;)

Ashish Menon - 5 years, 1 month ago

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Love this topic.

Abhiram Rao - 5 years, 1 month ago

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