43. Solving a chemistry problem

3. Calculate the pH at which a given precipitate is formed. Precipitation is carried out from a 0.005 M salt solution containing the precipitate cation. The excess of the precipitant containing the precipitate anion is 50% (one and a half times excess). An ion is considered to be completely precipitated if its concentration in the solution does not exceed 10-6 mol/L. When calculating, consider only the hydrolysis of the anion. Take the necessary constants from reference books.
Sediment - FeC2O4