The concentration of a 228.0-mL sample of a calcium chloride solution is 0.490 M. What is the mass of the solute?
A) 12.40 g
B) 8.44 g
C) 2.05 g
D) 239 g
E) 54.4 g

Question

Quizplus · Accepted Answer

To find the mass of the solute, first calculate the moles of solute using the concentration and volume of the solution. The formula for moles is concentration (M) times volume (L). Convert 228.0 mL to liters (0.228 L). Moles of solute = 0.490 M * 0.228 L = 0.11172 mol. The molar mass of calcium chloride (CaCl2) is approximately 110.98 g/mol. Therefore, the mass of the solute is 0.11172 mol * 110.98 g/mol = 12.40 g.

The Concentration of a 228