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?