Question Detail
Question
If 2.5 moles of zinc react with 6.0 moles of hydrochloric acid in the equation: Zn + 2HCl → ZnCl₂ + H₂. What is the limiting reactant?
Correct Answer
Option B is the correct answer.
Detailed Explanation
Stoichiometry: 1 mol Zn requires 2 mol HCl. For 2.5 mol Zn, need 5.0 mol HCl. HCl available is 6.0 mol, so HCl is in excess; Zn is limiting? Wait: 2.5 mol Zn needs 5.0 mol HCl. We have 6.0 mol HCl, so HCl is excess, Zn is limiting. Option D is Zn.
Hint
Compare required moles with available moles.