Please provide detailed solutions and/or links. 1.) The following four compounds

Question

Please provide detailed solutions and/or links.

1.) The following four compounds AgBr (Ksp = 5.0×10-13), PbI2 (Ksp = 7.9×10-9 ), HgI2 (Ksp = 1.3×10-19), and AgI (Ksp = 8.3×10-17) are sparely soluble in water. ____________has the lowest molar solubility of ____________M in water.

2.) (a)_________g, (b)___________g of PbI2 (Ksp = 8.5×10-9 , F. W. 461.01 g/mol) can be dissolved in 500 mL of (a) water and (b) 0.20 M NaI solution, respectively.

3.) For sparely soluble BaF2, in which of the following solution media it will have the highest molar solubility? __________ (a) 0.10 M KCl, (b) 0.30 M NaCl, (c) 0.20 M NaNO3, (d) 0.10 M K2SO4, and (e) 0.15 M ZnCl2.

Explanation / Answer

1.

Among the given Ksp of HgI2 is smallest and hence it is having lowest solubility.

HgI2 (s) = Hg2+ (aq.) + 2 I- (aq.)

Ksp = [Hg2+][I-]2

1.3 * 10-19 = S * S2

S = 5.06 * 10-7 M

HgI2 has the lowest molar solubility of 5.06 * 10-7 M in water

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