Calculate the molality of a solution formed by dissolving 34.8 g of LiI in 500.0 mL of water.
A) 0.254 m
B) 0.130 m
C) 0.696 m
D) 0.260 m
E) 0.520 m

Question

Quizplus · Accepted Answer

Molality (m) is calculated by dividing the moles of solute by the kilograms of solvent. The molar mass of LiI is approximately 133.85 g/mol. Thus, 34.8 g of LiI is 0.260 moles. Since 500.0 mL of water is 0.500 kg, the molality is 0.260 moles / 0.500 kg = 0.520 m.

Calculate the Molality of a Solution Formed by Dissolving 34