An aqueous solution contains 48.6 g of KNO₃ in 290.6 mL of solution. What is the molarity of the solution? A) 0.140 M KNO₃ B) 0.167 M KNO₃ C) 1.65 M KNO₃ D) 0.00716 M KNO₃ E) 0.0591 M KNO₃

Question

Quizplus · Accepted Answer

To find molarity, divide moles of solute by liters of solution. Molar mass of KNO3 is 101.1 g/mol. Moles of KNO3 = 48.6 g / 101.1 g/mol = 0.4808 mol. Volume in liters = 290.6 mL / 1000 = 0.2906 L. Molarity = 0.4808 mol / 0.2906 L = 1.65 M.

An Aqueous Solution Contains 48