Determine the ammonium ion concentration of a solution that results when 4.53 g of (NH₄)₂SO₄ is dissolved in water and diluted to exactly 100.0 mL.

Question

Quizplus · Accepted Answer

The molar mass of (NH₄)₂SO₄ is approximately 132.14 g/mol. The number of moles of (NH₄)₂SO₄ is 4.53 g / 132.14 g/mol = 0.0343 mol. Since each formula unit of (NH₄)₂SO₄ produces 2 NH₄⁺ ions, the concentration of NH₄⁺ ions is 2 * 0.0343 mol / 0.1 L = 0.686 M.

Determine the Ammonium Ion Concentration of a Solution That Results