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.