1. Use the following data to calculate the Ksp value for each solid. (a) The solubility of MncO3 is
1.1x 10-3 g/L. (b) The solubility of Al(OH)3 is 5.5x 10-9 mol/L.
Solution
Ans :
a) The dissociation reaction of MnCO3 is given as :
MnCO3 = Mn 2+
+ CO3 2-
Ksp = [Mn 2+
] [CO3 2-
]
putting values :
Ksp = (1.1 x 10 -3
) (1.1 x 10 -3
)
Ksp = 1.21 x 10 -6
b) The dissociation reaction of Al(OH)3 is given as :
Al(OH)3 = Al 3+
+ 3OH -
Ksp = [Al 3+
] [OH -
] 3
Putting values :
Ksp = (5.5 x 10 -9
) (3 x 5.5 x 10 -9
) 3
Ksp = 2.47 x 10 -32