REACTION STOICHIOMETRY

Question

1. How many moles of Cl2 can be produced from 5.60 mol HCl in reaction

HCl + O2 →  Cl2 + H2O (unbalanced) (3 significant. final answer)

Answer 1

First balance the equation:

4 HCl + 1 O₂ →  2 Cl₂ + 2 H₂O

Since 4 mol of HCl produces 2 mol of Cl₂, create a proportion to determine how many mol of Cl₂ that 5.60 mol of HCl would produce:

2 mol Cl₂ / 4 mol HCl = x mol Cl₂ / 5.60 mol HCl

x = 2.80 mol Cl₂