Which of the following aqueous solutions has the highest molar concentration of Na⁺ (aq)? (Assume each compound is fully dissolved in water.) A)3.0M NaCl (sodium chloride) B)3.0M NaC₂H₃O₂ (sodium acetate) C)1.5M Na₂SO₄ (sodium sulfate) D)1.0M Na₃PO₄ (sodium phosphate) E)All of these solutions have the same concentration of Na⁺ (aq).

Question

Quizplus · Accepted Answer

Each solution, when fully dissolved, contributes an equal number of moles of Na+ ions per liter of solution. Choices A and B directly provide 3.0 moles of Na+ per liter. Choice C provides 1.5 moles of Na2SO4, which dissociates into 2(1.5) = 3.0 moles of Na+. Choice D provides 1.0 mole of Na3PO4, which dissociates into 3(1.0) = 3.0 moles of Na+. Therefore, all solutions have the same molar concentration of Na+ ions.

Which of the Following Aqueous Solutions Has the Highest Molar