Question 1

Which salt has the highest molar solubility in pure water?

Accepted Answer

A) CdCO3 
B) Cd(OH)2 
C) Mn(OH)2 
D) PbCrO4 
E) Fe(OH)2 
A) CdCO3 
B) Cd(OH)2 
C) Mn(OH)2 
D) PbCrO4 
E) Fe(OH)2

Question 2

What is the minimum mass of Na2CO3 that must be added to 75.9 mL of a 9.0 × 10-4 M AgNO3 solution in order for precipitation to occur? For Ag2CO3,Ksp = 8.6 × 10-12 .

Accepted Answer

A) 7.2 × 10-3 g 
B) 3.1 × 10-4 g 
C) 3.6 × 10-3 g 
D) 7.7 × 10-8 g 
E) 8.5 × 10-5 g 
A) 7.2 × 10-3 g 
B) 3.1 × 10-4 g 
C) 3.6 × 10-3 g 
D) 7.7 × 10-8 g 
E) 8.5 × 10-5 g

Question 3

Which salt has the lowest molar solubility in pure water?

Accepted Answer

A) PbCrO4 
B) Fe(OH)2 
C) CdCO3 
D) Cd(OH)2 
E) Mn(OH)2 
A) PbCrO4 
B) Fe(OH)2 
C) CdCO3 
D) Cd(OH)2 
E) Mn(OH)2

Question 4

What is the effect of substituting soluble metal salts such as NaCl and K2CO3 for HCl or (NH4)2CO3 in the qualitative analysis scheme for separating the five Analytical Groups?

Accepted Answer

A) You can no longer tell if your original sample contained Na+ or K+. 
B) There is no effect on the analysis since Na+ and K+ do not form a precipitate. 
C) The NaCl and K2CO3 are not pure,analytical grade materials. 
D) Potassium ion forms a precipitate with sulfide ion. 
E) Na+ and K+ react violently with acids such as H2S,producing highly flammable and potentially explosive hydrogen gas. 
A) You can no longer tell if your original sample contained Na+ or K+. 
B) There is no effect on the analysis since Na+ and K+ do not form a precipitate. 
C) The NaCl and K2CO3 are not pure,analytical grade materials. 
D) Potassium ion forms a precipitate with sulfide ion. 
E) Na+ and K+ react violently with acids such as H2S,producing highly flammable and potentially explosive hydrogen gas.

Question 5

A saturated solution of which of the following salts will have the highest molar concentration of chromate ion?

Accepted Answer

A) CuCrO4 (Ksp = 3.6 × 10-6) 
B) BaCrO4 (Ksp = 2.1 × 10-10) 
C) Ag2CrO4 (Ksp = 1.2 × 10-12) 
D) Hg2CrO4 (Ksp = 2.0 × 10-9) 
E) Tl2CrO4 (Ksp = 9.8 × 10-13) 
A) CuCrO4 (Ksp = 3.6 × 10-6) 
B) BaCrO4 (Ksp = 2.1 × 10-10) 
C) Ag2CrO4 (Ksp = 1.2 × 10-12) 
D) Hg2CrO4 (Ksp = 2.0 × 10-9) 
E) Tl2CrO4 (Ksp = 9.8 × 10-13)

Question 6

Determine the molar solubility of AgCl in 3.5 M NH3.Ksp for AgCl is 1.8 × 10−10 and Kf for Ag(NH3)2+ is 1.7 × 107 at 25°C.

Accepted Answer

A) ​0.023 M 
B) ​0.081 M 
C) ​0.202 M 
D) ​0.176 M 
E) ​0.055 M 
A) ​0.023 M 
B) ​0.081 M 
C) ​0.202 M 
D) ​0.176 M 
E) ​0.055 M

Question 7

Which of the following will apply to a saturated solution of an ionic compound?

Accepted Answer

A) Qc sp 
B) Qc > Ksp 
C) Qc = Ksp 
D) Ksp = 1 
E) Qc = 1 
A) Qc sp 
B) Qc > Ksp 
C) Qc = Ksp 
D) Ksp = 1 
E) Qc = 1

Question 8

What is the maximum concentration of carbonate ions that will precipitate BaCO3 but not MgCO3 from a solution that is   M each in Mg2+ and Ba2+? For MgCO3,Ksp = 1.0 × 10-5 and for BaCO3,Ksp = 2.6 × 10-9.

Accepted Answer

A)    M 
B)    M 
C)    M 
D)    M 
E) 2.6 × 10-14 M 
A)    M 
B)    M 
C)    M 
D)    M 
E) 2.6 × 10-14 M

Question 9

What is the value of the dissociation constant,Kd,for the complex ion Zn(NH3)42+? For Zn(NH3)42+,Kf = 2.9 × 109.

Accepted Answer

A) 2.9 × 10-5 
B) 7.3 × 108 
C) 2.9 × 109 
D) 2.3 × 102 
E) 3.4 × 10-10 
A) 2.9 × 10-5 
B) 7.3 × 108 
C) 2.9 × 109 
D) 2.3 × 102 
E) 3.4 × 10-10

Question 10

What is the molar solubility of aluminum hydroxide at 25°C? The solubility product constant for aluminum hydroxide is 4.6 × 10-33 at 25°C.

Accepted Answer

A) 2.3 × 10-33 M 
B) 6.8 × 10-17 M 
C) 4.6 × 10-33 M 
D) 3.6 × 10-9 M 
E) 1.0 × 10-11 M 
A) 2.3 × 10-33 M 
B) 6.8 × 10-17 M 
C) 4.6 × 10-33 M 
D) 3.6 × 10-9 M 
E) 1.0 × 10-11 M

Question 11

A solution is 0.010 M in each of Pb(NO3)2,Mn(NO3)2,and Zn(NO3)2.Solid NaOH is added until the pH of the solution is 8.50.Which of the following statements is true?
Salt
Ksp
Pb(OH)2
1)4 × 10-20
Mn(OH)2
2)0 × 10-13
Zn(OH)2
2)1 × 10-16

Accepted Answer

A) Only Mn(OH)2 will precipitate. 
B) All three hydroxides will precipitate. 
C) Only Pb(OH)2 will precipitate. 
D) No precipitate will form. 
E) Only Zn(OH)2 and Pb(OH)2 will precipitate. 
A) Only Mn(OH)2 will precipitate. 
B) All three hydroxides will precipitate. 
C) Only Pb(OH)2 will precipitate. 
D) No precipitate will form. 
E) Only Zn(OH)2 and Pb(OH)2 will precipitate.

Question 12

What is the solubility product expression for Tb3(PO4)4?

Accepted Answer

A) Ksp = [Tb3+]4[PO44-]3 
B) Ksp = [3Tb3+][4PO43-] 
C) Ksp = [3Tb3+]3[4PO43-]4 
D) Ksp = [Tb2+]3[PO43-]2 
E) Ksp = [Tb4+]3[PO43-]4 
A) Ksp = [Tb3+]4[PO44-]3 
B) Ksp = [3Tb3+][4PO43-] 
C) Ksp = [3Tb3+]3[4PO43-]4 
D) Ksp = [Tb2+]3[PO43-]2 
E) Ksp = [Tb4+]3[PO43-]4

Question 13

What is the molar solubility of silver(I)chloride at 25°C? The solubility product constant for silver(I)chloride is 1.8 × 10-10 at 25°C.

Accepted Answer

A) 1.3 × 10-5 M 
B) 9.0 × 10-11 M 
C) 1.8 × 10-3 M 
D) 3.6 × 10-4 M 
E) 1.8 × 10-10 M 
A) 1.3 × 10-5 M 
B) 9.0 × 10-11 M 
C) 1.8 × 10-3 M 
D) 3.6 × 10-4 M 
E) 1.8 × 10-10 M

Question 14

Which of the following salts has the highest molar solubility in water?

Accepted Answer

A) SrCO3 (Ksp = 9.3 × 10-10) 
B) BaSO4 (Ksp = 1.1 × 10-10 ) 
C) PbS (Ksp = 2.5 × 10-27) 
D) BaCrO4 (Ksp = 1.2 × 10-10) 
E) AgCl (Ksp = 1.8 × 10-10 ) 
A) SrCO3 (Ksp = 9.3 × 10-10) 
B) BaSO4 (Ksp = 1.1 × 10-10 ) 
C) PbS (Ksp = 2.5 × 10-27) 
D) BaCrO4 (Ksp = 1.2 × 10-10) 
E) AgCl (Ksp = 1.8 × 10-10 )

Question 15

Rank the following salts in order of increasing molar solubility.
Salt
Ksp
BaSO4
1)1 × 10-10
AgCl
1)8 × 10-10
BaCO3
9)1 × 10-9
CdS
8 × 10-27
PbSO4
1)8 × 10-8

Accepted Answer

A) CdS 4 3 4 
B) CdS 3 4 4 
C) CdS 4 3 4 
D) PbSO4 3 4 4 3 4 < AgCl < CdS 
A) CdS 4 3 4 
B) CdS 3 4 4 
C) CdS 4 3 4 
D) PbSO4 3 4 4 3 4 < AgCl < CdS

Question 16

Which of Figures I-IV represent(s)the result of mixing aqueous solutions of Na2S and NiCl2 in which the ion product Qc > Ksp for the insoluble product? (C = cation,A = anion)

Accepted Answer

A) both I and II 
B) only I 
C) only II 
D) only III 
E) only IV 
A) both I and II 
B) only I 
C) only II 
D) only III 
E) only IV

Question 17

What is the maximum volume of 8.6 × 10-5 M K2CrO4 that,added to 40.4 mL of a solution that is 5.1 × 10-5 M Ba(NO3)2 and 1.5 × 10-6 M Pb(NO3)2,will precipitate PbCrO4 but not BaCrO4? For PbCrO4,Ksp = 1.8 × 10-14,and for BaCrO4,Ksp = 1.2 × 10-10.

Accepted Answer

A) 40 mL 
B) 1.1 mL 
C) 1.0 mL 
D) 0.0056 mL 
E) 37 mL 
A) 40 mL 
B) 1.1 mL 
C) 1.0 mL 
D) 0.0056 mL 
E) 37 mL

Question 18

The solubility of silver(I)carbonate is 3.6 × 10-2 g/L.What is the solubility product constant for silver(I)carbonate?

Accepted Answer

A) 4.4 × 10-15 
B)    
C) 1.7 × 10-8 
D) 1.3 × 10-4 
E) 1.3 × 10-3 
A) 4.4 × 10-15 
B)    
C) 1.7 × 10-8 
D) 1.3 × 10-4 
E) 1.3 × 10-3

Question 19

Consider a solution containing the following cations: Na+,Hg2+,Mn2+,Al3+ and Ag+.Treatment of the solution with dilute,HCl followed by saturation with H2S,results in formation of precipitate(s).Which ions still remain in solution (did not precipitate)?

Accepted Answer

A) Na+,Hg2+,Al3+ 
B) Na+ only 
C) Ag+ and Hg2+ 
D) Ag+ only 
E) Na+,Al3+,and Mn2+ 
A) Na+,Hg2+,Al3+ 
B) Na+ only 
C) Ag+ and Hg2+ 
D) Ag+ only 
E) Na+,Al3+,and Mn2+

Question 20

What is the molar solubility of lead(II)chloride at 25°C? The solubility product constant for lead(II)chloride is 1.6 × 10-5 at 25°C.

Accepted Answer

A) 1.6 × 10-2 M 
B) 1.6 × 10-5 M 
C) 8.0 × 10-6 M 
D) 4.0 × 10-3 M 
E) 3.2 × 10-2 M 
A) 1.6 × 10-2 M 
B) 1.6 × 10-5 M 
C) 8.0 × 10-6 M 
D) 4.0 × 10-3 M 
E) 3.2 × 10-2 M

Exam 17: Solubility and Complex-Ion Equilibria

Which salt has the highest molar solubility in pure water?

What is the minimum mass of Na2CO3 that must be added to 75.9 mL of a 9.0 × 10-4 M AgNO3 solution in order for precipitation to occur? For Ag2CO3,Ksp = 8.6 × 10-12 .

Which salt has the lowest molar solubility in pure water?

What is the effect of substituting soluble metal salts such as NaCl and K2CO3 for HCl or (NH4)2CO3 in the qualitative analysis scheme for separating the five Analytical Groups?

A saturated solution of which of the following salts will have the highest molar concentration of chromate ion?

Determine the molar solubility of AgCl in 3.5 M NH3.Ksp for AgCl is 1.8 × 10−10 and Kf for Ag(NH3)2+ is 1.7 × 107 at 25°C.

Which of the following will apply to a saturated solution of an ionic compound?

What is the maximum concentration of carbonate ions that will precipitate BaCO3 but not MgCO3 from a solution that is M each in Mg2+ and Ba2+? For MgCO3,Ksp = 1.0 × 10-5 and for BaCO3,Ksp = 2.6 × 10-9.

What is the value of the dissociation constant,Kd,for the complex ion Zn(NH3)42+? For Zn(NH3)42+,Kf = 2.9 × 109.

What is the molar solubility of aluminum hydroxide at 25°C? The solubility product constant for aluminum hydroxide is 4.6 × 10-33 at 25°C.

A solution is 0.010 M in each of Pb(NO3)2,Mn(NO3)2,and Zn(NO3)2.Solid NaOH is added until the pH of the solution is 8.50.Which of the following statements is true? Salt Ksp Pb(OH)2 1)4 × 10-20 Mn(OH)2 2)0 × 10-13 Zn(OH)2 2)1 × 10-16

What is the solubility product expression for Tb3(PO4)4?

What is the molar solubility of silver(I)chloride at 25°C? The solubility product constant for silver(I)chloride is 1.8 × 10-10 at 25°C.

Which of the following salts has the highest molar solubility in water?

Rank the following salts in order of increasing molar solubility. Salt Ksp BaSO4 1)1 × 10-10 AgCl 1)8 × 10-10 BaCO3 9)1 × 10-9 CdS 8 × 10-27 PbSO4 1)8 × 10-8

Which of Figures I-IV represent(s)the result of mixing aqueous solutions of Na2S and NiCl2 in which the ion product Qc > Ksp for the insoluble product? (C = cation,A = anion)

What is the maximum volume of 8.6 × 10-5 M K2CrO4 that,added to 40.4 mL of a solution that is 5.1 × 10-5 M Ba(NO3)2 and 1.5 × 10-6 M Pb(NO3)2,will precipitate PbCrO4 but not BaCrO4? For PbCrO4,Ksp = 1.8 × 10-14,and for BaCrO4,Ksp = 1.2 × 10-10.

The solubility of silver(I)carbonate is 3.6 × 10-2 g/L.What is the solubility product constant for silver(I)carbonate?

Consider a solution containing the following cations: Na+,Hg2+,Mn2+,Al3+ and Ag+.Treatment of the solution with dilute,HCl followed by saturation with H2S,results in formation of precipitate(s).Which ions still remain in solution (did not precipitate)?

What is the molar solubility of lead(II)chloride at 25°C? The solubility product constant for lead(II)chloride is 1.6 × 10-5 at 25°C.

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Filters

What is the minimum mass of Na₂CO₃ that must be added to 75.9 mL of a 9.0 × 10^-4 M AgNO₃ solution in order for precipitation to occur? For Ag₂CO₃,K_sp = 8.6 × 10^-12 .

What is the effect of substituting soluble metal salts such as NaCl and K₂CO₃ for HCl or (NH₄)₂CO₃ in the qualitative analysis scheme for separating the five Analytical Groups?

Determine the molar solubility of AgCl in 3.5 M NH₃.K_spfor AgCl is 1.8 × 10⁻¹⁰and K_ffor Ag(NH₃)₂⁺is 1.7 × 10⁷at 25°C.

What is the maximum concentration of carbonate ions that will precipitate BaCO₃ but not MgCO₃ from a solution that is M each in Mg²⁺ and Ba²⁺? For MgCO₃,K_sp = 1.0 × 10^-5 and for BaCO₃,K_sp = 2.6 × 10^-9.

What is the value of the dissociation constant,K_d,for the complex ion Zn(NH₃)₄²⁺? For Zn(NH₃)₄²⁺,K_f = 2.9 × 10⁹.

What is the molar solubility of aluminum hydroxide at 25°C? The solubility product constant for aluminum hydroxide is 4.6 × 10^-33 at 25°C.

A solution is 0.010 M in each of Pb(NO₃)₂,Mn(NO₃)₂,and Zn(NO₃)₂.Solid NaOH is added until the pH of the solution is 8.50.Which of the following statements is true? Salt K_sp Pb(OH)₂ 1)4 × 10^-20 Mn(OH)₂ 2)0 × 10^-13 Zn(OH)₂ 2)1 × 10^-16

What is the solubility product expression for Tb₃(PO₄)₄?

What is the molar solubility of silver(I)chloride at 25°C? The solubility product constant for silver(I)chloride is 1.8 × 10^-10 at 25°C.

Rank the following salts in order of increasing molar solubility. Salt K_sp BaSO₄ 1)1 × 10^-10 AgCl 1)8 × 10^-10 BaCO₃ 9)1 × 10^-9 CdS 8 × 10^-27 PbSO₄ 1)8 × 10^-8

Which of Figures I-IV represent(s)the result of mixing aqueous solutions of Na₂S and NiCl₂ in which the ion product Q_c > K_sp for the insoluble product? (C = cation,A = anion)

What is the maximum volume of 8.6 × 10^-5 M K₂CrO₄ that,added to 40.4 mL of a solution that is 5.1 × 10^-5 M Ba(NO₃)₂ and 1.5 × 10^-6 M Pb(NO₃)₂,will precipitate PbCrO₄ but not BaCrO₄? For PbCrO₄,K_sp = 1.8 × 10^-14,and for BaCrO₄,K_sp = 1.2 × 10^-10.

The solubility of silver(I)carbonate is 3.6 × 10^-2 g/L.What is the solubility product constant for silver(I)carbonate?

Consider a solution containing the following cations: Na⁺,Hg²⁺,Mn²⁺,Al³⁺ and Ag⁺.Treatment of the solution with dilute,HCl followed by saturation with H₂S,results in formation of precipitate(s).Which ions still remain in solution (did not precipitate)?

What is the molar solubility of lead(II)chloride at 25°C? The solubility product constant for lead(II)chloride is 1.6 × 10^-5 at 25°C.