11 mark
The correct form of the solubility product for calcium phosphate, Ca3(PO4)2, is
[Ca2+][PO43–]
[Ca2+]2[PO43–]3
[Ca2+]3[PO43–]2
[Ca2+]3[PO3–]4
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Solubility Equilibria (College Board AP® Chemistry): Exam Questions
30 mins12 questions
21 mark
Addition of the following salts will affect the solubility of ZnCO3 except
H2SO4
NaHCO3
ZnNO3
Na2SO4
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31 mark
For the following reaction at equilibrium
H2S (aq) + Mg2+ (aq) ⇋ MgS (s) + 2H+ (aq) ΔH < 0
The reaction occurs in an aqueous solution, and MgS precipitates as a solid.
Which of the following changes will result in more MgS being produced?
Adding sodium hydroxide.
Decreasing the pressure.
Adding H⁺ ions.
Increasing the temperature.
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11 mark
Ca(NO3)2 + K2SO4 → CaSO4 + 2KNO3
Ksp = 2.00 x 10-5 at 298 K
100 mL of a 1.70 x 10-3 M solution of calcium nitrate is slowly added to 100 mL of 1.50 x 10-3 M potassium sulfate.
Which of the following will be observed?
A precipitate forms because Q > Ksp
A precipitate forms because Q < Ksp
No precipitate forms because Q > Ksp
No precipitate forms because Q < Ksp
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21 mark
A saturated solution of Sr(OH)2 has a pH of 12.50. What is the solubility product of Sr(OH)2?
3.28 x 10-5
1.64 x 10-5
1.58 x 10-38
5.12 x 10-4
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31 mark
The solubility of silver carbonate (Ag2CO3) in pure water at 25∘C is found to be 8.45×10−3 M. If 0.100 M of sodium carbonate (Na2CO3) is added to the solution, what is the new solubility of Ag2CO3 assuming the solution reaches equilibrium?
The Ksp of Ag2CO3 at 25∘C is 8.1×10−12.
8.1×10−10 M
8.1×10−8 M
8.1×10−6 M
8.1×10−5 M
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