In a chemical reaction, the substance that limits product formation is limiting reagents. In the reaction, dichlorine is the limiting reagent.
Limiting reagent are the species that are present in less amount in the reaction mixture and gets consumed and hence limiting the product formation.
The balanced reaction is shown as:
2 Al + 3 Cl₂ ⇒ 2 AlCl₃
From the reaction, it can be seen that 3 moles of Cl₂ are required to completely react with 2 moles of Al.
Let suppose,
(2 moles Al ÷ 3 moles Cl2) × (2 moles Cl2) = 4/3 moles Al.
Therefore, Cl₂ must be the limiting reagent.
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