molality = number of moles of solute / weight of solvent (in
kg)
= (1.8/180) / 0.25 = 0.01/0.25 = 0.04M
Ag2C2O4
↔ 2Ag+
+ C2O42-
[ Ag+ ] = 2.24 × 10-4
mol L-1
[ C2 O42-
] = { 2.24×10-4 }/2 = mol L-1
= 1.12×10-4 mol L-1
Ksp = [Ag+]2[C2O42-]
= (2.24×10-4 mol-4 L-1
)2 (1.12×10-4 mol L-1)
= 5.619×10-12mol3
L-3