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Word Problems About Mixtures Help (page 2)

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By — McGraw-Hill Professional
Updated on Sep 27, 2011

Word Problems About Mixtures Practice Problems

Practice

  1. How much 60% acid solution should be added to 8 liters of 25% acid solution to produce a 40% acid solution?
  2. How many quarts of Increasing/Decreasing by a Percent Practice % fat milk should be added to 4 quarts of 2% fat milk to produce 1% fat milk?
  3. How much 30% alcohol solution should be mixed with 70% alcohol solution to produce 12 liters of 60% alcohol solution?
  4. How much 65% acid solution and 25% acid solution should be mixed together to produce 180 ml of 40% acid solution?
  5. How much water should be added to 10 liters of 45% alcohol solution to produce a 30% solution?
  6. How much decaffeinated coffee (assume this means 0% caffeine) and 50% caffeine coffee should be mixed to produce 25 cups of 40% caffeine coffee?
  7. How much pure acid should be added to 18 ounces of 35% acid solution to produce 50% acid solution?
  8. How many peanuts should be mixed with a nut mixture that is 40% peanuts to produce 36 ounces of a 60% peanut mixture?

Solutions

Increasing/Decreasing by a Percent Solutions

Increasing/Decreasing by a Percent Solutions

Add 6 liters of 60% solution to 8 liters of 25% solution to produce a 40% solution.

Increasing/Decreasing by a Percent Solutions

Increasing/Decreasing by a Percent Solutions

Add 8 quarts of Increasing/Decreasing by a Percent Solutions % fat milk to 4 quarts of 2% milk to produce 1% milk.

Increasing/Decreasing by a Percent Solutions

Increasing/Decreasing by a Percent Solutions

Add 3 liters of 30% alcohol solution to 12 – x = 12 – 3 = 9 liters of 70% alcohol solution to produce 12 liters of 60% alcohol solution.

Increasing/Decreasing by a Percent Solutions

Increasing/Decreasing by a Percent Solutions

Add 67.5 ml of 65% acid solution to 180 – x = 180 – 67.5 = 112.5 ml of 25% solution to produce 180 ml of 40% acid solution.

Increasing/Decreasing by a Percent Solutions

Increasing/Decreasing by a Percent Solutions

Add 5 liters of water to 10 liters of 45% alcohol solution to produce a 30% alcohol solution.

Increasing/Decreasing by a Percent Solutions

Increasing/Decreasing by a Percent Solutions

Mix 5 cups of decaffeinated coffee with 25 – x = 25 – 5 = 20 cups of 50% caffeine coffee to produce 25 cups of 40% caffeine coffee.

Increasing/Decreasing by a Percent Solutions

Increasing/Decreasing by a Percent Solutions

Add 5.4 ounces of pure acid to 18 ounces of 35% acid solution to produce a 50% acid solution.

Increasing/Decreasing by a Percent Solutions

Increasing/Decreasing by a Percent Solutions

Add 12 ounces of peanuts to 36 – x = 36 – 12 = 24 ounces of a 40% peanut mixture to produce 36 ounces of a 60% peanut mixture.

Practice problems for this concept can be found at: Algebra Word Problems Practice Test.

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