Quiz: Mixture Concentration Practice Problems (set 1)

This quiz contains questions based on mixture concentration and solution concentration. This quiz is specifically designed to test your understanding of ratios and percentages in the context of mixtures and solutions. To learn more about this topic, please watch the video provided in this post. While taking the quiz, avoid using external resources to ensure you fully grasp the concepts. If you don’t get all the answers correct on your first attempt, don’t worry—you can retake the quiz to aim for a perfect score! If you notice any errors in the questions or answers, please leave a comment so we can address them. Enjoy the quiz and good luck!

1. 
If you mix 20g of sugar with 80g of water, what is the concentration of sugar in the solution?

2. 
A solution has a ratio of 1:4 (solute to solvent). If the total mixture is 500g, how much solute is present?

3. 
A 15% salt solution means 15g of salt is dissolved in how much water?

4. 
A chemist mixes 300g of a 5% acid solution with 200g of a 10% acid solution. What is the concentration of the final mixture?

5. 
You have 150mL of a 30% alcohol solution. How much water must you add to dilute it to a 15% alcohol solution?

6. 
You mix 50g of a 12% salt solution with 100g of an 8% salt solution. What is the concentration of the final mixture?

7. 
A 40% sugar solution is mixed with a 10% sugar solution in a 1:2 ratio. What is the concentration of the final mixture?

8. 
A farmer mixes two types of fertilizer: one is 15% nitrogen, and the other is 25% nitrogen. To get 100kg of a 20% nitrogen mixture, how much of each fertilizer should they use?

9. 
You have three solutions: Solution A: 100mL of 10% sugar. Solution B: 200mL of 20% sugar. Solution C: 300mL of 30% sugar. If you mix all three solutions, what is the concentration of the final mixture?

10. 
You have 400g of a 12% salt solution. How much water must you add to dilute it to a 6% salt solution?

11. 
A 600g solution has a 20% salt concentration. If you add 200g of water and then 100g of salt, what is the final concentration?

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