84. Solving a chemistry problem

10. The specific resistance of a saturated solution of sparingly soluble salt A at 298 K is equal to ρ. Specific resistance of water at the same temperature ρ H2O = 1 • 106 Ohm • cm. Calculate: 1) the solubility of salt A in pure water; 2) the product of the solubility of this salt (assuming that the solution is highly dilute); 3) the solubility of substance A in solution, substance B, the concentration of which is equal to mB = 0.01 mol; 4) the solubility of substance A in a solution containing mB=0.01 mol of substance D. To estimate γ±, use the Debye-Hückel law.
N var A ρ , Ohm•cm B D
10 MgF2 3930 Mg(NO3)2 H2SO4