Mixture Concentration Averages Worksheet

Combine two abstract solution concentrations with this free mixture concentration averages worksheet. The practice page contains eight numbered questions, with a separate answer page so learners can attempt the work before checking. It is designed for focused practice after the underlying idea has been introduced, rather than as a timed test or a placement assessment.

How to work through the questions

Compute the amount of component in each portion, add those amounts, and divide by total volume. Assume volumes add exactly in these math models. Begin by identifying the information supplied and the quantity you need to find. Write at least one intermediate step beside each question; the working is often more useful than a final answer when you are deciding what to review.

A first-question check

The first prompt is: Mix 100 mL at 10% with 300 mL at 30%. Assume volumes add. Find final percent. The checked result is 25%. Use the method above to explain how the given information leads to that result. Then cover the key and solve the remaining questions independently.

What to watch for

Do not average the percentages unless the portion volumes are equal. These are arithmetic exercises, not laboratory instructions. If an answer differs from the key, compare one step at a time. Mark whether the issue came from reading the prompt, choosing an operation, calculating, or writing the units. Correct that step and retry the question without copying the answer.

Questions in text

1. Mix 100 mL at 10% with 300 mL at 30%. Assume volumes add. Find final percent.
2. Mix 100 mL at 11% with 300 mL at 31%. Assume volumes add. Find final percent.
3. Mix 100 mL at 12% with 300 mL at 32%. Assume volumes add. Find final percent.
4. Mix 100 mL at 13% with 300 mL at 33%. Assume volumes add. Find final percent.
5. Mix 100 mL at 14% with 300 mL at 34%. Assume volumes add. Find final percent.
6. Mix 100 mL at 15% with 300 mL at 35%. Assume volumes add. Find final percent.
7. Mix 100 mL at 16% with 300 mL at 36%. Assume volumes add. Find final percent.
8. Mix 100 mL at 17% with 300 mL at 37%. Assume volumes add. Find final percent.

Answer key

1. 25%
2. 26%
3. 27%
4. 28%
5. 29%
6. 30%
7. 31%
8. 32%

Download and print

Use Download image beneath either page to save its original 2550 × 3300 PNG. For a PDF, choose US Letter or A4 in that page’s controls and select Download PDF; the theme creates the file in your browser. Match the printer paper size, keep uniform scaling and check the margins in print preview. Print a test copy before making a classroom set. Keep the answer sheet separate during independent practice. These original worksheets are for personal and classroom use; share this article link when recommending them.

More free printables

• Percent of a Number Worksheet