Practice question
Question
What is the mass of BaSO₄ produced when 20 g of BaCl₂ reacts with excess H₂SO₄? (Molar masses: BaCl₂ = 208 g/mol, BaSO₄ = 233 g/mol)
Explanation
Reaction: BaCl₂ + H₂SO₄ → BaSO₄ + 2HCl. Moles of BaCl₂ = 20/208 ≈ 0.0962 mol. 1 mol BaCl₂ produces 1 mol BaSO₄; mass = 0.0962 × 233 ≈ 22.41 g.
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