Which of the following aqueous solutions of Na₂SO₄ is hypotonic with a 0.15 M NaCl solution? A) 0.05 M B) 0.10 M C) 0.15 M D) none of these

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A hypotonic solution has a lower osmotic pressure than the reference solution. NaCl dissociates into 2 ions (Na⁺ and Cl⁻), while Na₂SO₄ dissociates into 3 ions (2 Na⁺ and SO₄²⁻). Therefore, a 0.05 M Na₂SO₄ solution has an effective concentration of 0.15 M in terms of particles, making it isotonic with 0.15 M NaCl. To be hypotonic, the Na₂SO₄ solution must be less than 0.05 M.

Which of the Following Aqueous Solutions of Na2SO4 Is Hypotonic

Which of the Following Aqueous Solutions of Na₂SO₄ Is Hypotonic