Concentration Problems
Part I. Concentration (Mass/Volume) - Formula: Mass of solute/Volume of solution=g/L
1. A sugar solution contains 26 g of sugar in 0.50 L of solution. What is the concentration in g/L?
Answer: 26g/.50L=52 g/L
2. 45 g of salt are dissolved in 0.10 l of solution. What is the concentration in g/L?
3. A solution contains 25 g of sugar per liter of solution. How many grams of sugar are in 1.5 L of
solution?
4. A solution contains 85 g of corn syrup per liter of solution. How many grams of corn syrup are in
500 mL of solution?
5. How many liters of salt solution would be needed to provide 30 g of salt if the concentration of
the solution is 20 g/L?
Part II. Concentration (% By Volume) – Formula: V solute/V total x 100=%
1. 25 mL of ethanol is added to enough water to make 100 mL of solution. Find the percent by
volume of ethanol.
Answer: 25mL/100mL x 100=25%
2. 50 mL of ethanol is added to 50 mL of water. What is the percent by volume of ethanol?
3. 3.0 liters of antifreeze is added to 4.0 liters of water. Find the percent by volume of antifreeze.
4. A popular fruit drink contains 5% by volume fruit juice. How much fruit juice is in 500 mL of the
fruit drink?
5. How much corn syrup should be added to water to make 200 mL of a 10% by volume solution?