55. Solving a chemistry problem

2. In an electrochemical circuit composed of platinum and calomel electrodes immersed in the test solution containing Fe3 and Fe2 ions, the potential difference was 812 mV. Calculate the ratio of Fe3 and Fe2 concentrations in the solution and determine their concentrations in mg/ml if the total iron concentration is 3.4 ∙ 10–2 mol/l.