What is the molality of a solution that is 3.68 % by mass calcium chloride
A) 0.0332 m
B) 0.332 m
C) 0.344 m
D) 0.464 m
E) 0.506 m

Question

Quizplus · Accepted Answer

To find molality, use the formula: molality (m) = moles of solute / kg of solvent. Assume 100 g of solution, so 3.68 g of CaCl2. Molar mass of CaCl2 is 110.98 g/mol, so moles of CaCl2 = 3.68 g / 110.98 g/mol = 0.0332 mol. Mass of solvent (water) = 100 g - 3.68 g = 96.32 g = 0.09632 kg. Molality = 0.0332 mol / 0.09632 kg = 0.344 m.

What Is the Molality of a Solution That Is 3