# Lesson Worksheet: Percentage Concentration Chemistry

In this worksheet, we will practice expressing and calculating the percentage concentration of a solution by its volume or mass ratio.

Q1:

A 250 mL solution of hand sanitizer contains 150 mL of propan-2-ol. What is the percentage concentration by volume of propan-2-ol in this solution? Give your answer to the nearest whole percentage.

• A(v/v)
• B(v/v)
• C(v/v)
• D(v/v)
• E(v/v)

Q2:

A sugar solution was made by mixing 12 g of glucose with 100 g of water. What is the percentage concentration by mass of the glucose in the solution? Give your answer to one decimal place.

• A(m/m)
• B(m/m)
• C(m/m)
• D(m/m)
• E(m/m)

Q3:

What volume of water must be added to a 125 mL solution of ethanol to change its percentage volume from (v/v) to (v/v)? Give your answer to the nearest whole number.

Q4:

50 g of an anti-inflammatory ointment was found to contain 1.1 g of the main active ingredient. What is the percent by mass of the active ingredient in this ointment?

• A (m/m)
• B (m/m)
• C (m/m)
• D (m/m)
• E (m/m)

Q5:

50 g of a (m/m) solution was mixed together with 130 g of a (m/m) solution. What is the percentage concentration by mass of the new solution?

• A (m/m)
• B (m/m)
• C (m/m)
• D (m/m)
• E (m/m)

Q6:

A 0.75 L bottle of vinegar contains (v/v) of ethanoic acid. What volume of ethanoic acid does the bottle of vinegar contain? Give your answer to two decimal places.

Q7:

A 30 g tube of antiseptic cream contains (w/w) of cetrimide. What mass of cetrimide does the cream contain?

Q8:

Which of the following equations can be used to calculate the percentage by volume, , of a solution?

• A
• B
• C
• D
• E

Q9:

Which of the following equations can be used to calculate the percentage by mass, , of a solution?

• A
• B
• C
• D
• E

Q10:

A saline solution was prepared by dissolving 9 g of in water to produce a solution with a total volume of 1,000 mL. What is the mass/volume percentage concentration, (m/v), of the saline solution?

This lesson includes 15 additional questions and 39 additional question variations for subscribers.