Question 1

Barium carbonate has a measured solubility of 4.03 $\times$10-5 at 25°C.Determine the Ksp.

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 2

Which of the following compounds has the lowest solubility in mol/L in water at 25°C?

Accepted Answer

A) Ag3PO4 Ksp = 1.8 $\times$10-18 
B) Sn(OH)2 Ksp = 3 $\times$10-27 
C) CdS Ksp = 1.0 $\times$ 10-28 
D) CaSO4 Ksp = 6.1 $\times$10-5 
E) Al(OH)3 Ksp = 2 $\times$ 10-33 
A) Ag3PO4 Ksp = 1.8 $\times$10-18 
B) Sn(OH)2 Ksp = 3 $\times$10-27 
C) CdS Ksp = 1.0 $\times$ 10-28 
D) CaSO4 Ksp = 6.1 $\times$10-5 
E) Al(OH)3 Ksp = 2 $\times$ 10-33

Question 3

Find the solubility (in mol/L)of lead(II)chloride,PbCl2,at 25°C.Ksp = 1.59 $\times$10-5.

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 4

The solubility in mol/L of M(OH)2 in 0.053 M KOH is 1.0 $\times$ 10-5 mol/L.What is the Ksp for M(OH)2?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 5

What is the concentration of Ni2+(aq)ion in a 0.045 M Ni(NO3)2 solution that is also 1.0 M NH3? [Kf for Ni(NH3)62+ = 5.5 $\times$ 108]

Accepted Answer

A)    M 
B)    M 
C)    M 
D)    M 
E) none of these 
A)    M 
B)    M 
C)    M 
D)    M 
E) none of these

Question 6

A 300.0-mL saturated solution of copper(II)peroidate,Cu(IO4)2,contains 0.30 grams of dissolved salt.Determine the Ksp.

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 7

Calculate the concentration of the silver ion in a saturated solution of silver chloride,AgCl (Ksp = 1.57 $\times$ 10-10).

Accepted Answer

A)    
B)    
C)    
D)    
E) none of these 
A)    
B)    
C)    
D)    
E) none of these

Question 8

The solubility in mol/L of Ag2CrO4 is 1.8 $\times$ 10-4 M.Calculate the Ksp for this compound.

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 9

The Kf for the complex ion Ag(NH3)2+ is 1.7 $\times$ 107.The Ksp for AgCl is 1.6 $\times$10-10.Calculate the molar solubility of AgCl in 1.0 M NH3.

Accepted Answer

A) 5.2 $\times$10-2 
B) 4.7 $\times$ 10-2 
C) 2.9 $\times$ 10-3 
D) 1.3 $\times$ 10-5 
E) 1.7 $\times$ 10-10 
A) 5.2 $\times$10-2 
B) 4.7 $\times$ 10-2 
C) 2.9 $\times$ 10-3 
D) 1.3 $\times$ 10-5 
E) 1.7 $\times$ 10-10

Question 10

In the classic scheme for qualitative analysis,the cations of Analytical Group IV are precipitated as phosphates or carbonates.Analytical Group IV consists of

Accepted Answer

A) alkali metals 
B) alkaline earth elements 
C) the halogens 
D) transition metals having +2 ions 
E) none of these 
A) alkali metals 
B) alkaline earth elements 
C) the halogens 
D) transition metals having +2 ions 
E) none of these

Question 11

Which of the following solid salts is more soluble in 1.0 M H+ than in pure water?

Accepted Answer

A) NaCl 
B) CaCO3 
C) KCl 
D) AgCl 
E) KNO3 
A) NaCl 
B) CaCO3 
C) KCl 
D) AgCl 
E) KNO3

Question 12

The cation M2+ reacts with NH3 to form a series of complex ions as follows: M2+ + NH3
    M(NH3)2+
K1 = 102
M(NH3)2+ + NH3
    M(NH3)22+
K2 = 103
M(NH3)22+ + NH3
    M(NH3)32+
K3 = 102
A 1.0 $\times$10-3 mol sample of M(NO3)2 is added to 1.0 L of 15.0 M NH3 (Kb = 1.8 $\times$ 10-5).Choose the dominant species in this solution.

Accepted Answer

A) M2+ 
B) M(NH3)2+ 
C) M(NH3)22+ 
D) M(NH3)32+ 
E) M(NO3)2 
A) M2+ 
B) M(NH3)2+ 
C) M(NH3)22+ 
D) M(NH3)32+ 
E) M(NO3)2

Question 13

The solubility of an unknown salt,M2Z,in a 0.0768 M CaZ solution is   mol/L.Calculate the Ksp for M2Z.

Accepted Answer

A)    
B)    
C)    
D)    
E) none of these 
A)    
B)    
C)    
D)    
E) none of these

Question 14

Calculate the molar concentration of uncomplexed Zn2+ in a solution that contains 0.20 mole of Zn(NH3)42+ per liter and 0.0116 M NH3 at equilibrium.The overall Kf for Zn(NH3)42+ is 3.8 $\times$ 109.

Accepted Answer

A) 2.9 $\times$ 10-3 M 
B) 8.8 $\times$ 10-3 M 
C) 6.7 $\times$ 10-4 M 
D) 2.0 $\times$ 10-13 M 
E) none of these 
A) 2.9 $\times$ 10-3 M 
B) 8.8 $\times$ 10-3 M 
C) 6.7 $\times$ 10-4 M 
D) 2.0 $\times$ 10-13 M 
E) none of these

Question 15

Silver acetate,AgC2H3O2, is a sparingly soluble salt with Ksp = 1.9 $\times$ 10-3.Consider a saturated solution in equilibrium with the solid salt.Compare the effects on the solubility of adding to the solution either the acid HNO3 or the base NH3.

Accepted Answer

A) Either substance would decrease the solubility. 
B) NH3 would increase the solubility,but HNO3 would decrease it. 
C) NH3 would increase the solubility,but HNO3 would have virtually no effect. 
D) Either substance would increase the solubility. 
E) NH3 would decrease the solubility,but HNO3 would increase it. 
A) Either substance would decrease the solubility. 
B) NH3 would increase the solubility,but HNO3 would decrease it. 
C) NH3 would increase the solubility,but HNO3 would have virtually no effect. 
D) Either substance would increase the solubility. 
E) NH3 would decrease the solubility,but HNO3 would increase it.

Question 16

Which of the following solid salts should be more soluble in 1.0 M NH3 than in water?

Accepted Answer

A) Na2CO3 
B) KCl 
C) AgBr 
D) KNO3 
E) none of these 
A) Na2CO3 
B) KCl 
C) AgBr 
D) KNO3 
E) none of these

Question 17

When a mixture containing cations of Analytical Groups I-III is treated with H2S in acidic solution,which cations are expected to precipitate?

Accepted Answer

A) Analytical Group I only 
B) Analytical Group II only 
C) Analytical Group III only 
D) Analytical Groups I and II 
E) Analytical Groups II and III 
A) Analytical Group I only 
B) Analytical Group II only 
C) Analytical Group III only 
D) Analytical Groups I and II 
E) Analytical Groups II and III

Question 18

The solubility of silver phosphate,Ag3PO4,at 25°C is 1.55 $\times$10-5 mol/L.Determine the concentration of the Ag+ ion in a saturated solution.

Accepted Answer

A)    M 
B)    M 
C)    M 
D)    M 
E)    M 
A)    M 
B)    M 
C)    M 
D)    M 
E)    M

Question 19

How many moles of CaF2 will dissolve in 3.0 liters of 0.089 M NaF solution? (Ksp for CaF2 = 4.0 $\times$10-11)

Accepted Answer

A)    
B)    
C)    
D)    
E) none of these 
A)    
B)    
C)    
D)    
E) none of these

Question 20

The following questions refer to the following system: 3.5 $\times$ 10S1U1P12S1S1P0 mL of 3.2 M Pb(NOS1U1B13S1U1B0)S1U1B12S1U1B0 and 2.0 $\times$ 10S1U1P12S1S1P0 mL of 0.020 M NaCl are added together.KS1U1B1spS1U1B0 for the lead chloride is 1.6 $\times$ 10S1U1P1-S1S1P0S1U1P15S1S1P0.
-Determine the ion product.

Accepted Answer

A) 1.1 $\times$ 10-4 
B) 1.5 $\times$ 10-2 
C) 7.8 $\times$ 10-3 
D) 8.1 $\times$ 10-4 
E) none of these 
A) 1.1 $\times$ 10-4 
B) 1.5 $\times$ 10-2 
C) 7.8 $\times$ 10-3 
D) 8.1 $\times$ 10-4 
E) none of these

Exam 16: Solubility and Complex Ion Equilibria

Barium carbonate has a measured solubility of 4.03 ×\times× 10-5 at 25°C.Determine the Ksp.

Which of the following compounds has the lowest solubility in mol/L in water at 25°C?

Find the solubility (in mol/L)of lead(II)chloride,PbCl2,at 25°C.Ksp = 1.59 ×\times× 10-5.

The solubility in mol/L of M(OH)2 in 0.053 M KOH is 1.0 ×\times× 10-5 mol/L.What is the Ksp for M(OH)2?

What is the concentration of Ni2+(aq)ion in a 0.045 M Ni(NO3)2 solution that is also 1.0 M NH3? [Kf for Ni(NH3)62+ = 5.5 ×\times× 108]

A 300.0-mL saturated solution of copper(II)peroidate,Cu(IO4)2,contains 0.30 grams of dissolved salt.Determine the Ksp.

Calculate the concentration of the silver ion in a saturated solution of silver chloride,AgCl (Ksp = 1.57 ×\times× 10-10).

The solubility in mol/L of Ag2CrO4 is 1.8 ×\times× 10-4 M.Calculate the Ksp for this compound.

The Kf for the complex ion Ag(NH3)2+ is 1.7 ×\times× 107.The Ksp for AgCl is 1.6 ×\times× 10-10.Calculate the molar solubility of AgCl in 1.0 M NH3.

In the classic scheme for qualitative analysis,the cations of Analytical Group IV are precipitated as phosphates or carbonates.Analytical Group IV consists of

Which of the following solid salts is more soluble in 1.0 M H+ than in pure water?

The solubility of an unknown salt,M2Z,in a 0.0768 M CaZ solution is mol/L.Calculate the Ksp for M2Z.

Calculate the molar concentration of uncomplexed Zn2+ in a solution that contains 0.20 mole of Zn(NH3)42+ per liter and 0.0116 M NH3 at equilibrium.The overall Kf for Zn(NH3)42+ is 3.8 ×\times× 109.

Silver acetate,AgC2H3O2, is a sparingly soluble salt with Ksp = 1.9 ×\times× 10-3.Consider a saturated solution in equilibrium with the solid salt.Compare the effects on the solubility of adding to the solution either the acid HNO3 or the base NH3.

Which of the following solid salts should be more soluble in 1.0 M NH3 than in water?

When a mixture containing cations of Analytical Groups I-III is treated with H2S in acidic solution,which cations are expected to precipitate?

The solubility of silver phosphate,Ag3PO4,at 25°C is 1.55 ×\times× 10-5 mol/L.Determine the concentration of the Ag+ ion in a saturated solution.

How many moles of CaF2 will dissolve in 3.0 liters of 0.089 M NaF solution? (Ksp for CaF2 = 4.0 ×\times× 10-11)

The following questions refer to the following system: 3.5 ×\times× 102 mL of 3.2 M Pb(NO3)2 and 2.0 ×\times× 102 mL of 0.020 M NaCl are added together.Ksp for the lead chloride is 1.6 ×\times× 10-5. -Determine the ion product.

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Filters

Barium carbonate has a measured solubility of 4.03 $\times$ 10^-⁵ at 25°C.Determine the K_sp.

Find the solubility (in mol/L)of lead(II)chloride,PbCl₂,at 25°C.K_sp = 1.59 $\times$ 10^-⁵.

The solubility in mol/L of M(OH)₂ in 0.053 M KOH is 1.0 $\times$ 10^-⁵ mol/L.What is the K_sp for M(OH)₂?

What is the concentration of Ni²⁺(aq)ion in a 0.045 M Ni(NO₃)₂ solution that is also 1.0 M NH₃? [K_f for Ni(NH₃)₆²⁺ = 5.5 $\times$ 10⁸]

A 300.0-mL saturated solution of copper(II)peroidate,Cu(IO₄)₂,contains 0.30 grams of dissolved salt.Determine the K_sp.

Calculate the concentration of the silver ion in a saturated solution of silver chloride,AgCl (K_sp = 1.57 $\times$ 10^-¹⁰).

The solubility in mol/L of Ag₂CrO₄ is 1.8 $\times$ 10^-⁴ M.Calculate the K_sp for this compound.

The K_f for the complex ion Ag(NH₃)₂⁺ is 1.7 $\times$ 10⁷.The K_sp for AgCl is 1.6 $\times$ 10^-¹⁰.Calculate the molar solubility of AgCl in 1.0 M NH₃.

Which of the following solid salts is more soluble in 1.0 M H⁺ than in pure water?

The solubility of an unknown salt,M₂Z,in a 0.0768 M CaZ solution is mol/L.Calculate the K_sp for M₂Z.

Calculate the molar concentration of uncomplexed Zn²⁺ in a solution that contains 0.20 mole of Zn(NH₃)₄²⁺ per liter and 0.0116 M NH₃ at equilibrium.The overall K_f for Zn(NH₃)₄²⁺ is 3.8 $\times$ 10⁹.

Silver acetate,AgC₂H₃O_2, is a sparingly soluble salt with K_sp = 1.9 $\times$ 10^-³.Consider a saturated solution in equilibrium with the solid salt.Compare the effects on the solubility of adding to the solution either the acid HNO₃ or the base NH₃.

Which of the following solid salts should be more soluble in 1.0 M NH₃ than in water?

When a mixture containing cations of Analytical Groups I-III is treated with H₂S in acidic solution,which cations are expected to precipitate?

The solubility of silver phosphate,Ag₃PO₄,at 25°C is 1.55 $\times$ 10^-⁵ mol/L.Determine the concentration of the Ag⁺ ion in a saturated solution.

How many moles of CaF₂ will dissolve in 3.0 liters of 0.089 M NaF solution? (K_sp for CaF₂ = 4.0 $\times$ 10^-¹¹)

The following questions refer to the following system: 3.5 $\times$ 10² mL of 3.2 M Pb(NO₃)₂ and 2.0 $\times$ 10² mL of 0.020 M NaCl are added together.K_sp for the lead chloride is 1.6 $\times$ 10^-⁵. -Determine the ion product.