Problema Solution
A pharmacist wants to make 40 ml of a 76% hydrogen peroxide solution. How many mls of 55% hydrogen peroxide must he mix with 85% hydrogen peroxide to make the desired solution
Answer provided by our tutors
let 'x' represent the amount of 85% solution, then '40-x' represents the amount of 55% solution
the equation for combining the solutions:
0.76*40 = 0.85x + 0.55(40-x)
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x=28
40-28=12
12 ml of 85% should be combined with 28 ml of 55%