What is the molarity of an aqueous solution prepared by dissolving 25.0 grams of Na₂SO₄ in enough water to form 500 mL of solution?
Molar Mass(Na₂SO₄) = 142.0 g/mol

Question

What is the molarity of an aqueous solution prepared by dissolving 25.0 grams of Na₂SO₄ in enough water to form 500 mL of solution? Molar Mass(Na₂SO₄) = 142.0 g/mol

Quizplus · Accepted Answer

To find the molarity, divide the moles of solute by the liters of solution. Moles of Na₂SO₄ = 25.0 g / 142.0 g/mol = 0.176 mol. The solution volume is 500 mL = 0.500 L. Molarity = 0.176 mol / 0.500 L = 0.352 M.

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