Solution Calculation

  • Thread starter mmmeraki
  • Start date
  • #1
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Homework Statement


How many grams of K2Cr2O7 (350 g 6,50%) must be added to get saturate the solution at 20C (12,6 g/100 g)?

Homework Equations



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:

Answers and Replies

  • #2
Borek
Mentor
28,632
3,105
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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