Percent Mass
Mass of solute/Mass of solution x 100
1. Calculate the percent by mass of 3.55 g NaCl dissolved in 88 grams of water.
2. Calculate the percent by mass of benzene in a solution containing 14.2 grams of benzene
in 28.0 grams of carbon tetrachloride.
3. A solution is made by adding 1.23 mol KCl to 1000.0 grams of water. What is the
percent by mass of KCl in this solution?
4. What mass of water must be added to 255.0 grams NaCl to make a 15.00 percent by mass
aqueous solution?
5. Calculate the percent by mass of 35 grams of sucrose dissolved in 140 grams of water.
6. Calculate the percent by mass of 25 grams of copper chloride mixed in 65 grams of
water.
7. Calculate the percent by mass of 17 grams of oxygen mixed in 250 grams of water
8. Calculate the percent by mass of 15 grams of potassium chloride mixed in 50 grams of
water.
9. Calculate the percent by mass of 70 grams of aluminum sulfate in 160 grams of water.
10. Calculate the percent by mass of 10 grams of calcium hydroxide mixed in 65 grams of
water.
Percent by Volume
Volume of Solute/Volume of Solution x 100
1. What is the percent by volume of ethanol in a solution that contains 30 ml of ethanol
dissolved in 120 ml of water?
2. If you had 120 ml of a 35% solution of ethanol, what volume of ethanol and water are in
the solution?
3. What is the percent by volume of isopropyl alcohol in a solution that contains 45 ml of
isopropyl alcohol in 1.4 L of water?
4. What is the percent by volume of 25 ml of methanol in 75 ml of water?
5. The label on a 300 ml stock bottle reads 30% alcohol by volume. What volume of
alcohol does it contain?
6. The label on a 2.5 liter bottle of sulfuric acid reads 15.2% sulfuric acid. What volume of
acid does it contain in ml?
7. The label on a bottle of Hydrogen peroxide reads 11.2% hydrogen peroxide. The bottle
is 600 ml. How many ml of hydrogen peroxide does the bottle contain?
8. An isopropyl solution contains 70 ml of isopropyl alcohol in 1.8 L of water. What is the
percent by volume of the alcohol?
9. A sample of saline contains 45 ml of saline in 128 ml of water. What is the percent by
volume of the solution?
10. A sample of hydrochloric acid reads that it is 35% hydrochloric acid. If the bottle is 150
ml, how many ml of water does it contain?