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I.
Molarity:
1) What is the molarity of a solution that contains 0.25 moles of magnesium oxalate in 3.65 mL of solution?
2) What is the molarity of a solution that contains 4.53 moles of lithium nitrate, LiNO3 in 2.85 liters of
solution?
3) A flask contains 85.5 g C12H22O11 (sucrose) in 1.00 liter of solution. What is the molarity?
4) Calculate the molarity if a flask contains 21.54 g of potassium sulfate in 2250 ml of solution.
5) What volume of a 0.02M ammonium nitrate (NH4NO3) solution would contain 3.0 g of ammonium
nitrate?
6) How many grams of hydrochloric acid HCl would be in 5.00 L of a 1.2 M solution?
7) How many moles of magnesium oxalate (MgC2O4) are in 31.00 ml of a 5.0 M magnesium oxalate
solution?
8) A rabbit weighs out 1.56 moles of copper (II) sulfate into a flask and adds enough water to make a
2.0M solution. What is the volume of that solution?
9)
If 45 mL of water are added to 250 mL of a 0.75 M K2SO4 solution, what will the molarity of the
diluted solution be?
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10)
If water is added to 175 mL of a 0.45 M KOH solution until the volume is 250 mL, what will the
molarity of the diluted solution be?
11)
How much 0.075 M NaCl solution can be made by diluting 450 mL of 9.0 M NaCl?
12)
If 550 mL of a 3.50 M KCl solution are set aside and allowed to evaporate until the volume of the
solution is 275 mL, what will the molarity of the solution be?
II.
Molality:
1) What is the molality of a solution made by adding 2.00 moles of sodium chloride (NaCl) to 1.00 Kg of
water?
2) What is the molality of a solution that contains 0.52 g of glucose (C6H12O6) in 0.150Kg of water?
3) How many Kg of solvent is mixed with 3.0 moles of urea to make a 1.2m solution?
4) How much water is needed to make a 0.50 m solution from 3.2 g of NaCl?
5) What mass of CH3OH is needed to add to 1.20 kg of water to make a 3.00 m solution?
6) What is the boiling point of a solution made by dissolving 31 g of NaCl in 559 g of water?
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7) Calculate the freezing point of an a nonionizing antifreeze solution containing 388g ethylene glycol,
C2H6O2 , and 409 g of water.
8) Calculate the boiling point of an ionic solution containing 29.7 g Na2SO4 and 84.4 g water.
III.
Percent Concentration
1) What is the percent concentration by mass of 5.0 g of NaCl mixed with 80. g of water?
2) What mass of NaOH is found in 40. g of a 10% by mass solution?
3) What is the percent by volume if 22 mL of CO2 is dissolved in enough water to make 85 mL of solution?
4) What volume of ethylene glycol (in mL) is needed to make 1500 mL of antifreeze, a 60.0 % (by volume)
solution?
IV.
Electrolytes
Identify each of the following as an electrolyte or nonelectrolyte. Then, identify the number of ions each
compound breaks into in water.
Compound
Electrolyte?
# of Ions?
Ca(NO3)2
HCN
Ca(OH)2
Li2SO3
H2SO4
C6H12O6
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