AP Chemistry Unit 7

Which of the following compounds is the least soluble?

•  $MnCO_3$  

•  $CuS$  

•  $CdS$  

•  $PbS$  

• Both  $CdS$  and $PbS$  

Given the reaction at equilibrium: Zn(OH) ↔ Zn²⁺ + 2OH

What is the expression for the solubility product constant, K_sp, for this reaction?

• K_sp = [Zn²⁺][OH^-] / [Zn(OH)₂]

• K_sp = [Zn(OH)₂] / [Zn²⁺][2OH^-]

• K_sp = [Zn²⁺][2OH^-]

• K_{sp =} [Zn²⁺][OH^-]²

Which of the following is the expression for the solubility product of Ca₃(PO₄)₂?

• K_sp = [Ca²⁺]³[PO₄³]²

• K_sp = [3 x Ca²⁺]³[2 x PO₄³]²

• K_sp =3[Ca²⁺] x 2[PO₄³]

• K_sp =3[Ca²⁺]³ + 2[PO₄³]²

• K_sp = [Ca²⁺]₃[PO₄³]₂

Given the following table of Ksp values, determine which compound listed has the greatest solubility.

• CdCO₃

• Cd(OH)₂

• AgI

• Fe(OH)₃

• ZnCO₃

The solubility of silver sulfate (Ag₂SO₄), in moles per liter, can be expressed in terms of the resulting ion concentrations.

Which relationship is correct?

• solubility = 2[Ag⁺]

• solubility = [Ag⁺]

• solubility = [2Ag⁺]

• solubility = 2[SO₄²]

• solubility = [SO₄²]

Which expression best describes the relationship between solubility product, K_sp, and the solubility, s, of MgF₂?

• K_sp = 2x

• K_sp = x²

• K_sp = 2x³

• K_sp = 4x²

• K_sp = 4x³

In which of the following aqueous solutions would you expect AgCl to have the lowest solubility?

• Pure Water

• 0.020 M BaCl₂

• 0.015 M NaCl

• 0.020 M AgNO₃

• 0.020 M KC

In which of the following aqueous solutions would you expect AgCl to have the highest solubility?

• Pure Water

• 0.020 M BaCl₂

• 0.015 M NaCl

• 0.020 M AgNO₃

• 0.020 M KC

In which of the following aqueous solutions would you expect AgBr to have the lowest solubility?

• Pure Water

• 0.20 M NaBr

• 0.10 M AgNO₃

• 0.15 M KBr

• 0.10 M LiBr

In which of the following aqueous solutions would you expect AgBr to have the highest solubility?

• Pure Water

• 0.20 M NaBr

• 0.10 M AgNO₃

• 0.15 M KBr

• 0.10 M LiBr