Question Detail
Question
A solution is prepared by dissolving 10.0 g of NaCl in enough water to make 250.0 mL of solution. The molarity of the solution is: (Na=23, Cl=35.5)
Correct Answer
Option A is the correct answer.
Detailed Explanation
Molar mass NaCl = 58.5 g/mol. Moles NaCl = 10.0/58.5 = 0.171 mol. Volume = 0.250 L. Molarity = 0.171/0.250 = 0.684 M.
Hint
Molarity = moles of solute / liters of solution.