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How many milliliters of pure acid must be added to 150 milliliters of a 70% solution of acid to obtain a 80% solution?

  • Math - ,

    let the amount to be added be x ml

    .7(150) + x = .8(150+x)
    times 10
    7(150) + 10x = 8(150+x)
    solve for x

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