Question

doreen schmidt is a chemist. she needs to prepare 36 ounces of a 10% hydrochloric acid solution. find the amount of 18% solution and the amount of 9% solution she should mix to get this solution.
how many ounces of the 18% acid solution should be in the mixture?
ounces

Explanation:

Step1: Set up equations

We know that \(x + y=36\) (total volume equation) and \(0.09x + 0.18y=0.1\times36\) (acid - content equation). From \(x + y=36\), we can express \(x = 36 - y\).

Step2: Substitute and solve

Substitute \(x = 36 - y\) into \(0.09x+0.18y = 0.1\times36\).

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Answer:

\(4\) ounces.