127. Solving a chemistry problem
200. A 20% KF solution was added to a solution containing 0.1 mol/l Fe(SCN)3 and 2 mol/l KSCN. The total volume of the mixture was 1 liter. How many milliliters of KF solution were added if 99.99% Fe(SCN)3 turned into FeF4-? What is the equilibrium concentration of F-?
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