Practice Limiting Reactant in Chemistry

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

Quick Recap

The reactant that is completely consumed first in a reaction, determining the maximum product yield.

If you have 10 buns and 5 patties, you can only make 5 burgers—patties are limiting.

Example 1

medium
If 4.0 mol of \text{H}_2 reacts with 1.0 mol of \text{O}_2 in the reaction 2\text{H}_2 + \text{O}_2 \rightarrow 2\text{H}_2\text{O}, which is the limiting reactant?

Example 2

hard
Given 10.0 g of \text{N}_2 and 10.0 g of \text{H}_2, how many grams of \text{NH}_3 can be produced? (\text{N}_2 + 3\text{H}_2 \rightarrow 2\text{NH}_3)

Example 3

medium
In a reaction \text{A} + 2\text{B} \rightarrow \text{C}, if you have 3 mol of A and 4 mol of B, which is limiting?

Example 4

medium
In the reaction \text{N}_2 + 3\text{H}_2 \rightarrow 2\text{NH}_3, if you have 2.0 mol of \text{N}_2 and 5.0 mol of \text{H}_2, which reactant is limiting and how many moles of \text{NH}_3 can form?
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