1 The molar solubility of nickelII hydroxide in a 0147 M nic

1. The molar solubility of nickel(II) hydroxide in a 0.147 M nickel(II) nitratesolution is  M.

2. The maximum amount of calcium carbonate that will dissolve in a 0.108 M calcium nitrate solution is  M.

3. The molar solubility of manganese(II) sulfide in a 0.227 M potassium sulfide solution is  M.

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Solution

1.)

Ni(OH)2   -------------> Ni+2   +    2 OH-

   x                                0                0

-s                                s                 2s

x-s                               0.147 + x       2s

Ksp = [Ni+2][OH-]^2

2.8 x 10^-16 = (0.147) (2S)^2

S = 2.18 x 10^-8 M

molar solubility = 2.18 x 10^-8 M

2.)

CaCO3 ------------> Ca+2 + CO32-

Ksp = [Ca+2][CO32-]

3.8 x 10^-9 = [0.108] [S]

S = 3.52 x 10^-8 M

maximum amount of CaCO3 = 3.52 x 10^-8 M

3. The molar solubility of manganese(II) sulfide in a 0.227 M potassium sulfide solution is  M.

Ksp = [Mn+2][S2-]

5.1 x 10^-15 = S x 0.227

S = 2.25 x 10^-14 M

moalr solubility = 2.25 x 10^-14 M