Question 1

In the qualitative analysis scheme for metal ions,how are the Analytical Group III cations separated from the cations of Analytical Groups IV and V?

Accepted Answer

A)  by addition of H2S in acidic solution,forming insoluble metal sulfides
B)  by addition of (NH4) 2CO3 or (NH4) 3PO4,forming insoluble metal carbonates or phosphates
C)  by addition of H2SO4,forming insoluble metal sulfates
D)  by addition of HCl,forming insoluble metal chlorides
E)  by addition of H2S in basic solution,forming insoluble metal sulfides or hydroxidesF) C) and D)
G) All of the above

Question 2

What is the molar solubility of MgF2 in a 0.36 M Mg(NO3) 2 solution? For MgF2,Ksp = 8.4 × 10-8.

Accepted Answer

A)  8.0 × 10-8 M
B)  2.4 × 10-4 M
C)  2.0 × 10-8 M
D)  4.8 × 10-4 M
E)  3.2 × 10-3 MF) A) and D)
G) B) and D)

Question 3

Ksp for PbF2 is 4.0 ×10-8.If a 0.032 M NaF solution is saturated with PbF2,what is [Pb2+] in solution?

Accepted Answer

A)  4.1 × 10-11 M
B)  1.3 × 10-9 M
C)  1.3 × 10-6 M
D)  1.2 × 10-3 M
E)  3.9 × 10-5 MF) B) and D)
G) A) and D)

Question 4

The following reaction represents a step in the separation of which analytical group of cations?
Cu2+(aq) + S2-(aq) → CuS(s)

Accepted Answer

A)  Analytical Group I
B)  Analytical Group III
C)  Analytical Group V
D)  Analytical Group IV
E)  Analytical Group IIF) B) and C)
G) None of the above

Question 5

What is the molar equilibrium concentration of uncomplexed Fe2+(aq) in a solution composed of 1.4 mol Fe(CN) 64− dissolved in 1.00 L of 0.33 M NaCN.Kf for Fe(CN) 64− is 2+(aq) in a solution composed of 1.4 mol Fe(CN) 64− dissolved in 1.00 L of 0.33 M NaCN.Kf for Fe(CN) 64− is   . A)    M B)    M C)    M D)    M E)    M" class="answers-bank-image d-inline" rel="preload" > .

Accepted Answer

A)   2+(aq) in a solution composed of 1.4 mol Fe(CN) 64− dissolved in 1.00 L of 0.33 M NaCN.Kf for Fe(CN) 64− is   . 
A)     M 
B)     M 
C)     M 
D)     M 
E)     M" class="answers-bank-image d-inline" rel="preload" > M
B)   2+(aq) in a solution composed of 1.4 mol Fe(CN) 64− dissolved in 1.00 L of 0.33 M NaCN.Kf for Fe(CN) 64− is   . 
A)     M 
B)     M 
C)     M 
D)     M 
E)     M" class="answers-bank-image d-inline" rel="preload" > M
C)   2+(aq) in a solution composed of 1.4 mol Fe(CN) 64− dissolved in 1.00 L of 0.33 M NaCN.Kf for Fe(CN) 64− is   . 
A)     M 
B)     M 
C)     M 
D)     M 
E)     M" class="answers-bank-image d-inline" rel="preload" > M
D)   2+(aq) in a solution composed of 1.4 mol Fe(CN) 64− dissolved in 1.00 L of 0.33 M NaCN.Kf for Fe(CN) 64− is   . 
A)     M 
B)     M 
C)     M 
D)     M 
E)     M" class="answers-bank-image d-inline" rel="preload" > M
E)   2+(aq) in a solution composed of 1.4 mol Fe(CN) 64− dissolved in 1.00 L of 0.33 M NaCN.Kf for Fe(CN) 64− is   . 
A)     M 
B)     M 
C)     M 
D)     M 
E)     M" class="answers-bank-image d-inline" rel="preload" > MF) All of the above
G) B) and D)

Question 6

The figure below represents the result of adding which of the following aqueous solutions to a filtered,saturated solution of AgCl? 3(aq)  C) HCl(aq) or NaCl(aq)  D) only HCl(aq)  E) HCl(aq) or HNO3(aq) " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  only NaCl(aq) 
B)  only HNO3(aq) 
C)  HCl(aq) or NaCl(aq) 
D)  only HCl(aq) 
E)  HCl(aq) or HNO3(aq) F) C) and D)
G) D) and E)

Question 7

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

Accepted Answer

A)  Ni(OH) 2 (Ksp = 2.0 × 10-15) 
B)  Fe(OH) 2 (Ksp = 8 × 10-16) 
C)  PbI2 (Ksp = 6.5 × 10-9) 
D)  CaCO3 (Ksp = 3.8 × 10-9) 
E)  AgBr (Ksp = 5.0 × 10-13) F) B) and D)
G) None of the above

Question 8

What is the molar solubility of MgF2 in a 0.40 M NaF solution? For MgF2,Ksp = 8.4 × 10-8.

Accepted Answer

A)  1.0 × 10-7 M
B)  1.4 × 10-4 M
C)  2.1 × 10-7 M
D)  7.1 × 10-4 M
E)  5.3 × 10-7 MF) B) and D)
G) C) and D)

Question 9

The solubility of calcium carbonate in water at 25°C is sp of this sparingly soluble salt? A)    B)    C)    D)    E)   " class="answers-bank-image d-inline" rel="preload" > g/L.What is the Ksp of this sparingly soluble salt?

Accepted Answer

A)   sp of this sparingly soluble salt? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
B)   sp of this sparingly soluble salt? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
C)   sp of this sparingly soluble salt? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
D)   sp of this sparingly soluble salt? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   sp of this sparingly soluble salt? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) D) and E)
G) B) and D)

Question 10

A(n) _____ is a Lewis base that bonds to a metal ion to form a complex ion.

Accepted Answer

A)  ​ligand
B)  ​zwitterion
C)  ​substrate
D)  ​alkane
E)  ​areneF) D) and E)
G) B) and D)

Question 11

What is the solubility (in g/L) of barium chromate at 25°C? The solubility product constant for barium chromate is 1.2 × 10-10 at 25°C.

Accepted Answer

A)  0.41 g/L
B)  3.0 × 10-8 g/L
C)  1.5 × 10-8 g/L
D)  0.078 g/L
E)  0.0027 g/LF) D) and E)
G) A) and B)

Question 12

The solubility of lead(II) sulfate is 4.0 × 10-2 g/L.What is the solubility product constant for lead(II) sulfate?

Accepted Answer

A)  1.7 × 10-8
B)  1.3 × 10-4
C)  1.6 × 10-3
D)  4.6× 10-15
E)  8.9 × 10-12F) C) and D)
G) A) and E)

Question 13

Rank the following salts in order of increasing molar solubility.
2CrO4 3PO4 B) AgSCN 3PO4 2CrO4 C) Ag3PO4 2CrO4 3PO4 2CrO4 E) Ag2CrO4 3PO4" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  AgSCN 2CrO4 3PO4
B)  AgSCN 3PO4 2CrO4
C)  Ag3PO4 2CrO4 
D)  Ag3PO4 2CrO4
E)  Ag2CrO4 3PO4F) A) and B)
G) A) and C)

Question 14

Cation C and anion A form an ionic compound for which Ksp = s2,where s is the molar solubility of the ionic compound.Which of Figures I-III represent(s) possible results of the mixing of an aqueous solution containing cation C with an aqueous solution containing anion A? sp = s2,where s is the molar solubility of the ionic compound.Which of Figures I-III represent(s) possible results of the mixing of an aqueous solution containing cation C with an aqueous solution containing anion A?   A) only I B) only III C) both I and III D) both I and II E) only II" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

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

Question 15

Pure water is saturated with slightly soluble calcium fluoride,CaF2.Which of the following is true concerning the equilibrium concentration of Ca2+?

Accepted Answer

A)   2.Which of the following is true concerning the equilibrium concentration of Ca2+? 
A)     
B)  [Ca2+] = [F-] 
C)     
D)     
E)  [Ca2+] = Ksp" class="answers-bank-image d-inline" rel="preload" >
B)  [Ca2+] = [F-]
C)   2.Which of the following is true concerning the equilibrium concentration of Ca2+? 
A)     
B)  [Ca2+] = [F-] 
C)     
D)     
E)  [Ca2+] = Ksp" class="answers-bank-image d-inline" rel="preload" >
D)   2.Which of the following is true concerning the equilibrium concentration of Ca2+? 
A)     
B)  [Ca2+] = [F-] 
C)     
D)     
E)  [Ca2+] = Ksp" class="answers-bank-image d-inline" rel="preload" >
E)  [Ca2+] = KspF) B) and D)
G) All of the above

Question 16

What is the solubility product expression for Pb(IO3) 2?

Accepted Answer

A)  Ksp = [Pb2+][IO3-]2
B)  Ksp = [Pb4+][2IO32-]2
C)  Ksp = [Pb2+][2IO3-]
D)  Ksp = [Pb4+][IO32-]2
E)  Ksp = [Pb2+][2IO3-]2F) A) and D)
G) A) and E)

Question 17

Suppose sodium hydroxide is added to a 0.0042 M solution of zinc nitrate such that the pH of the solution is 13.04.What is the equilibrium concentration of Zn2+?
Zn2+(aq) + 4OH-(aq)  2+? Zn2+(aq) + 4OH-(aq)   Zn(OH) 42-(aq) ; Kf = 2.8 × 1015 A) 1.6 × 10-17 M B) 4.2 × 10-3 M C) 2.7 × 10-2 M D) 1.0 × 10-14 M E) 1.4 × 10-17 M" class="answers-bank-image d-inline" rel="preload" >Zn(OH) 42-(aq) ; Kf = 2.8 × 1015

Accepted Answer

A)  1.6 × 10-17 M
B)  4.2 × 10-3 M
C)  2.7 × 10-2 M
D)  1.0 × 10-14 M
E)  1.4 × 10-17 MF) C) and D)
G) B) and C)

Question 18

Which sparingly soluble salt will exhibit the highest solubility at low pH's?

Accepted Answer

A)  PbS (Ksp = 2.5 × 10-27) 
B)  MnS (Ksp = 2.5 × 10-10) 
C)  HgS (Ksp = 1.6 × 10-52) 
D)  NiS (Ksp = 3 × 10-9) 
E)  ZnS (Ksp = 1.1 × 10-21) F) B) and C)
G) A) and B)

Question 19

Which of the following solutions should be added to a solution containing both copper(II) ions and silver(I) ions in order to precipitate only one of the ions?

Accepted Answer

A)  HCl(aq) 
B)  H2S(aq) 
C)  HNO3(aq) 
D)  H2S(aq) + HCl(aq) 
E)  H2S(aq) + HNO3(aq) F) B) and D)
G) A) and D)

Question 20

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

Accepted Answer

A)  CaCO3 (Ksp = 3.8 × 10-9) 
B)  Ni(OH) 2 (Ksp = 2.0 × 10-15) 
C)  Fe(OH) 2 (Ksp = 8 × 10-16) 
D)  AgBr (Ksp = 5.0 × 10-13) 
E)  PbI2 (Ksp = 6.5 × 10-9) F) D) and E)
G) None of the above

Exam 17: Solubility and Complex-Ion Equilibria

The figure below represents the result of adding which of the following aqueous solutions to a filtered,saturated solution of AgCl?

Correct AnswerverifiedShow Answer

The solubility of calcium carbonate in water at 25°C is g/L.What is the Ksp of this sparingly soluble salt?

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

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Suppose sodium hydroxide is added to a 0.0042 M solution of zinc nitrate such that the pH of the solution is 13.04.What is the equilibrium concentration of Zn2+? Zn2+(aq) + 4OH-(aq) Zn(OH) 42-(aq) ; Kf = 2.8 × 1015

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What is the solubility product expression for Pb(IO3) 2?

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In the qualitative analysis scheme for metal ions,how are the Analytical Group III cations separated from the cations of Analytical Groups IV and V?

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Which of the following solutions should be added to a solution containing both copper(II) ions and silver(I) ions in order to precipitate only one of the ions?

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The following reaction represents a step in the separation of which analytical group of cations? Cu2+(aq) + S2-(aq) → CuS(s)

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What is the molar equilibrium concentration of uncomplexed Fe2+(aq) in a solution composed of 1.4 mol Fe(CN) 64− dissolved in 1.00 L of 0.33 M NaCN.Kf for Fe(CN) 64− is .

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Rank the following salts in order of increasing molar solubility.

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Pure water is saturated with slightly soluble calcium fluoride,CaF2.Which of the following is true concerning the equilibrium concentration of Ca2+?

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Cation C and anion A form an ionic compound for which Ksp = s2,where s is the molar solubility of the ionic compound.Which of Figures I-III represent(s) possible results of the mixing of an aqueous solution containing cation C with an aqueous solution containing anion A?

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Ksp for PbF2 is 4.0 ×10-8.If a 0.032 M NaF solution is saturated with PbF2,what is [Pb2+] in solution?

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A(n) _____ is a Lewis base that bonds to a metal ion to form a complex ion.

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Which sparingly soluble salt will exhibit the highest solubility at low pH's?

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What is the molar solubility of MgF2 in a 0.40 M NaF solution? For MgF2,Ksp = 8.4 × 10-8.

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

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The solubility of lead(II) sulfate is 4.0 × 10-2 g/L.What is the solubility product constant for lead(II) sulfate?

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What is the molar solubility of MgF2 in a 0.36 M Mg(NO3) 2 solution? For MgF2,Ksp = 8.4 × 10-8.

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What is the solubility (in g/L) of barium chromate at 25°C? The solubility product constant for barium chromate is 1.2 × 10-10 at 25°C.

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Correct Answer
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The solubility of calcium carbonate in water at 25°C is g/L.What is the K_sp of this sparingly soluble salt?

Correct Answer
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Correct Answer
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Suppose sodium hydroxide is added to a 0.0042 M solution of zinc nitrate such that the pH of the solution is 13.04.What is the equilibrium concentration of Zn²⁺? Zn²⁺(aq) + 4OH^-(aq) Zn(OH) ₄^2-(aq) ; K_f = 2.8 × 10¹⁵

Correct Answer
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What is the solubility product expression for Pb(IO₃) ₂?

Correct Answer
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The following reaction represents a step in the separation of which analytical group of cations? Cu²⁺(aq) + S^2-(aq) → CuS(s)

Correct Answer
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What is the molar equilibrium concentration of uncomplexed Fe²⁺(aq) in a solution composed of 1.4 mol Fe(CN) ₆⁴⁻ dissolved in 1.00 L of 0.33 M NaCN.K_f for Fe(CN) ₆⁴− is .

Correct Answer
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Correct Answer
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Pure water is saturated with slightly soluble calcium fluoride,CaF₂.Which of the following is true concerning the equilibrium concentration of Ca²⁺?

Correct Answer
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Cation C and anion A form an ionic compound for which K_sp = s²,where s is the molar solubility of the ionic compound.Which of Figures I-III represent(s) possible results of the mixing of an aqueous solution containing cation C with an aqueous solution containing anion A?

Correct Answer
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K_sp for PbF₂ is 4.0 ×10^-8.If a 0.032 M NaF solution is saturated with PbF₂,what is [Pb²⁺] in solution?

Correct Answer
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Correct Answer
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Correct Answer
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What is the molar solubility of MgF₂ in a 0.40 M NaF solution? For MgF₂,K_sp = 8.4 × 10^-8.

Correct Answer
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Correct Answer
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The solubility of lead(II) sulfate is 4.0 × 10^-2 g/L.What is the solubility product constant for lead(II) sulfate?

Correct Answer
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What is the molar solubility of MgF₂ in a 0.36 M Mg(NO₃) ₂ solution? For MgF₂,K_sp = 8.4 × 10^-8.

Correct Answer
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What is the solubility (in g/L) of barium chromate at 25°C? The solubility product constant for barium chromate is 1.2 × 10^-10 at 25°C.

Correct Answer
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