Chem 102 - General Chemistry II » Winter 2021 » Quiz 3

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Question #1
Write the solubility product constant expression for the reaction of Silver Sulfide (Ag2S(s)) dissolving to Silver-ion and Sulfide-ion.
A.   Ksp = [Ag+1]^2 [S=2]
B.   Ksp = [Ag+1]^2 [S–2]
C.   Ksp = [Ag+1]^2 [S+2]
Question #2
The solubility product constant of lead(II) iodide (PbI2) is 6.5 x 10–9. The solubility product constant of lead sulfate (PbSO4) is 1.7 x 10–8. Which salt is least soluble? Briefly explain your answer for full credit.
A.   PbI2 is less soluble because its Ksp is greater than Ksp of PbSO4
B.   PbI2 is less soluble because its Ksp is smaller than Ksp of PbSO4
C.   PbI2 is less soluble because its Ksp is smaller than Ksp of PbSO1
D.   PbI2 is more soluble because its Ksp is smaller than Ksp of PbSO4
Question #3
The ionic concentration of a salt that has dissolved into a saturated solution is 4.8 x10–3 M. What is the molar solubility of the salt? The salt has a molecular weight of 137.4 g/mol.
A.   4.8 x10+3 M
B.   4.8 x10–3 M
C.   4.8 x10–4 M
Question #4
The ionic concentration of a salt that has dissolved into a saturated solution is 6.8 x10–5 M. What is the solubility of the salt? The salt has a molecular weight of 471.3 g/mol.
A.   0.320 g/L
B.   0.0320 g/L
C.   0.00320 g/L
Question #5
The solubility product constant of silver acetate (AgC2H3O2) is 2.0 x 10–3. The solubility product constant of silver chloride (AgCl) is 1.8 x 10–10. If 0.280 M AgC2H3O2 is placed in a solution of AgCl, what is the common-ion?
A.   Ag+1
B.   Ag-1
C.   Ag+2

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