Practice question
Question
What is the mass of CaSO₄ produced when 13.6 g of Ca(OH)₂ reacts with excess H₂SO₄? (Molar masses: Ca(OH)₂ = 74 g/mol, CaSO₄ = 136 g/mol)
Explanation
Reaction: Ca(OH)₂ + H₂SO₄ → CaSO₄ + 2H₂O. Moles of Ca(OH)₂ ≈ 0.1838 mol. 1 mol Ca(OH)₂ produces 1 mol CaSO₄; mass ≈ 25 g.
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