Problem: The scene below represents a mixture of A2 (blue) and B2 (green) before they react to form AB3.(a) What is the limiting reactant?(b) How many molecules of product can form?

FREE Expert Solution

We are asked what is the limiting reactant and how many molecules of product can form.


Step 1. Balance the reaction. 

A2 + B2 → AB3

Balance A

A2 + B2 → 2 AB3

Balance B

A2 + 3 B2 → 2 AB3


Step 2. Calculate product base on both reactants. 

A2 → 3 molecules

1 molecule A2 : 2 molecules AB3

3 molecules A2 × 3 molecules AB31 molecules A2 

= 9 molecules AB3


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Problem Details

The scene below represents a mixture of A2 (blue) and B2 (green) before they react to form AB3.

(a) What is the limiting reactant?

(b) How many molecules of product can form?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Limiting Reagent concept. You can view video lessons to learn Limiting Reagent. Or if you need more Limiting Reagent practice, you can also practice Limiting Reagent practice problems.

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Based on our data, we think this problem is relevant for Professor Massari's class at UMN.