By using Davies Equation estimate

i. for 0.025 mol/kg aqueous MgSO4 solution at 25 C,

ii. for MgSO4 (aq) in aqueous solution that has Mg(NO3)2 (aq) molality 0.01 mol/kg Na2SO4 (aq) molality 0.02 mol/kg and MgCl2 molality 0.03 mol/kg.

iii. Compare and discuss the results of part i) and ii).