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Homework Help: Solution Calculation

  1. Jun 1, 2016 #1
    1. The problem statement, all variables and given/known data
    How many grams of K2Cr2O7 (350 g 6,50%) must be added to get saturate the solution at 20C (12,6 g/100 g)?

    2. Relevant equations

    3. The attempt at a solution
    350 g x 0,065 = 22,75 K2Cr2O7
    I got 10 g, but it's not correct. The correct answer is 18,5 g.
    Last edited: Jun 1, 2016
  2. jcsd
  3. Jun 1, 2016 #2


    User Avatar

    Staff: Mentor

    You calculated the amount of the dichromate already present, not the amount that has to be added to saturate the solution.
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