Chemistry

How many grams of a stock solution that is 87.0 percent H2SO4 by mass would be needed to make 200 grams of a 35.5 percent by mass solution? Show all of the work needed to solve this problem.

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asked by Stephanie
  1. Initial mass of H2SO4 = final mass of H2SO4 in solution

    Initial mass is (87.0%) of target solution (X).
    Final mass is (35.5%) of the initial solution (200g).

    X = 200g * 35.5/87.0

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    posted by Graham

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