Рассчитать растворимость CaCrO4 в 0.01 молярном р. ре Na2C2O4

ПР(CaC2O4) = [Ca(2+)]*[C2O4(2–)] = 2,3*10^–9,
[C2O4(2–)] = 0,01, [Ca(2+)]*0,01 = 2,3*10^–9,
[Ca(2+)] = 2,3*10^–9/0,01 = 2,3*10^–7 моль/л,
s = [Ca(2+)] = 2,3*10^–7 моль/л (2,94*10^–5 г/л).