CP CHEMISTRY
Molarity and Molality WS
Name: __________________________________
____ period
I.
Molarity Problems
Be sure to show all your work!!
1.
What is the molarity of an aqueous solution that contains 14.2 g NaCl dissolved in 2.35 L of
solution?
2.
How many grams of NaCl would be contained in 1.00 L of the solution in #1?
3.
A solution is made by dissolving 17.0 g of lithium iodide (LiI) in enough water to make 387 mL
of solution. What is the molarity of the solution?
4.
How many grams are contained in 150 mL of a 0.20 M solution of K2SO4?
5.
Calculate the molarity of a water solution of CaCl2, given that 5.04 L of the solution contains
612 g of CaCl2.
6.
Suppose you wish to make 0.85 L of a 0.25 M solution of silver nitrate, AgNO3? How many
grams of the AgNO3 would you need to prepare the solution?
CP CHEMISTRY, Molarity and Molality WS, page 2
II.
Molality
Be sure to show all work!!!
1.
What is the molality of a solution that contains 16.3 g of potassium chloride, KCl, dissolved in
845 g of water?
2.
What is the molality of a solution formed by mixing 104 g of silver nitrate, AgNO3, with 1.75
kg of water?
3.
Suppose that 5.25 g of sulfur, S8, is dissolved in 682 g of the liquid solvent carbon disulfide,
CS2. What is the molality of the sulfur solution?
4.
What is the molality of a solution that contains 25 g of NaCl in 2.2 kg of water?