In the reaction (2 ext{Al}+3 ext{CuCl}_2 ightarrow2 ext{AlCl}_3+3 ext{Cu} ), a student says that 1 mol of aluminium will produce 1 mol of copper. Which statement correctly corrects the error?
Answer and explanation
Correct answer: 1 mol Al reacts with 1.5 mol CuCl₂ to form 1.5 mol Cu
In the balanced equation, the mole ratio Al : CuCl₂ : Cu is 2 : 3 : 3. Thus, 2 mol Al reacts with 3 mol CuCl₂ to produce 3 mol Cu. Therefore, with sufficient CuCl₂, 1 mol Al produces 1.5 mol Cu. Option A incorrectly treats the coefficient ratio as 1 : 1.
Frequently asked questions
What is the correct answer to this question?
1 mol Al reacts with 1.5 mol CuCl₂ to form 1.5 mol Cu
Why is this the correct answer?
In the balanced equation, the mole ratio Al : CuCl₂ : Cu is 2 : 3 : 3. Thus, 2 mol Al reacts with 3 mol CuCl₂ to produce 3 mol Cu. Therefore, with sufficient CuCl₂, 1 mol Al produces 1.5 mol Cu. Option A incorrectly treats the coefficient ratio as 1 : 1.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
