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.