# Concentrations of Solutions Molarity and Molality

Part A

A solution contains 0.173g of glycerol, C3H8O3, and 20.0 g of water.

The density of water is 1.00g/mL

What are the Molarity, Molality and % m / m concentrations of the solution?

Part B

What are the boiling and freezing points of the solution that has a molality of

0.062?

https://brainmass.com/chemistry/stoichiometry/concentrations-solutions-molarity-molality-396012

#### Solution Preview

Part A

A solution contains 0.173g of glycerol, C3H8O3, and 20.0 g of water.

The density of water is 1.00g/mL

What are the Molarity, Molality and % m / m concentrations of the solution?

Molarity = M = mole solute /liter solution

Mole glycerol = 0.173 g C3H8O3 (1 mol C3H8O3 / 92 g)

Mole glycerol = 1.88 x 10-3 mol C3H8O3

Volume of water = 20 g H2O (1 mL / 1 g) = 20 mL = 0.02 L

(Note: Since the amount of solute (glycerol) is very small, it can be assumed ...

#### Solution Summary

The expert determines what is the molarity, molality and concentrations of the solution is determined.