Question

A science experiment requires a 10% hydrogen peroxide solution. How much hydrogen peroxide must be added to 16 ounces of water to yield a 10% solution?

Answer 1

Answer:

  1 7/9 ounces

Step-by-step explanation:

The final solution will be 9 parts water and 1 part hydrogen peroxide (so that hydrogen peroxide makes up 1 of 10 parts of the solution).

Then each "part" is (16 ounces)/9 = 1 7/9 ounces.

1 7/9 ounces of hydrogen peroxide must be added to 16 ounces of water to make a 10% solution.

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Check

The total amount of solution is 16 +1 7/9 = 17 7/9 ounces = 160/9 ounces. The amount that is hydrogen peroxide is 16/9 ounces, so the fraction that is hydrogen peroxide is ...

  (16/9) / (160/9) = 16/160 = 1/10 = 10%