Question

A pharmacist wants to make 30ml of a 40% hydrogen peroxide solution. How many mls of 46% hydrogen peroxide must he mix with 36% hydrogen peroxide to make the desired solution?

Answer 1

12 mL of 46% solution

Explanation:

Let q represent the volume of 46% solution needed in the mix. Then the total amount of hydrogen peroxide in the solution is ...

0.46q +0.36(30 -q) = 0.40(30)

0.10q +10.8 = 12.0

0.10q = 1.2

q = 12 . . . . . . mL of 46% solution needed

He must mix 12 mL of 46% solution to make the desired result.

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... and 18 mL of 36% solution