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March 26, 2017

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Solution A is 25% acid and Solution B is 40% acid. How much of each is needed to make 60 liters of a solution that is 30% acid?

  • algebra - ,

    Not sure if this is right, but 30% acid is 5% away from Solution A, and 10% away from Solution B, so I figured the ratio needed of Solution A:Solution B was 2:1. I then did
    2x+x=60
    x=20

    since the ratio is 2x:x, it is also 40:20.

    40 liters Solution A, 20 liters Solution B.

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