Question 1

The solubility of silver chloride _______________ when dilute nitric is added to it.

Accepted Answer

A)  increases
B)  decreases
C)  does not change
D)  first increases,then decreases
E)  first decreases,then increasesF) B) and E)
G) D) and E)

Question 2

A 35.0-mL sample of 0.20 M LiOH is titrated with 0.25 M HCl.What is the pH of the solution after 23.0 mL of HCl have been added to the base?

Accepted Answer

A)  1.26
B)  1.67
C)  12.33
D)  12.74
E)  13.03F) A) and C)
G) A) and D)

Question 3

What will be the effect of adding 0.5 mL of 0.1 M NaOH to 100 mL of an acetate buffer in which [CH3COOH] = [CH3COO-] = 0.5 M?

Accepted Answer

A)  The pH will increase slightly.
B)  The pH will increase significantly.
C)  The pH will decrease slightly.
D)  The pH will decrease significantly.
E)  Since it is a buffer solution,the pH will not be affected.F) B) and D)
G) C) and D)

Question 4

Calculate the solubility of strontium fluoride,SrF2,in pure water.Ksp = 2.6  ×	imes×  10-9

Accepted Answer

A)  1.4  ×	imes×  10-3 M
B)  3.4  ×	imes×  10-4 M
C)  8.7  ×	imes×  10-4 M
D)  5.l  ×	imes×  10-5 M
E)  ×	imes×  10-5 M F) A) and E)
G) B) and E)

Question 5

Which one of the following is the best representation of the titration curve which will be obtained in the titration of a weak acid (0.10 mol L-1) with a strong base of the same concentration?

Accepted Answer

A)  -1) with a strong base of the same concentration? 
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G) C) and D)

Question 6

The lab technician Anna Lytic adds 2.20 mol KOH to 1.00 L of 0.5 M Al(NO3) 3.What is the concentration of aluminum ions after the aluminum nitrate has reacted with the potassium hydroxide?
Kf = 3.0  ×	imes×  1033 for Al(OH) 4-

Accepted Answer

A)  1.8  ×	imes×  10-7 M
B)  9.l  ×	imes×  10-18 M
C)  1.0  ×	imes×  10-31 M
D)  3.3  ×	imes×  10-34 M
E)  7.l  ×	imes×  10-36 M F) B) and E)
G) A) and E)

Question 7

When a weak acid is titrated with a weak base,the pH at the equivalence point

Accepted Answer

A)  is greater than 7.0.
B)  is equal to 7.0.
C)  is less than 7.0.
D)  is determined by the sizes of Ka and Kb.
E)  is no longer affected by addition of base.F) B) and C)
G) C) and E)

Question 8

A buffer is prepared by adding 300.0 mL of 2.0 M NaOH to 500.0 mL of 2.0 M CH3COOH.What is the pH of this buffer? Ka = 1.8  ×	imes×  10-5

Accepted Answer

A)  4.57
B)  4.52
C)  4.87
D)  4.92
E)  4.97 F) None of the above
G) C) and D)

Question 9

Which of the following indicators would be the best to use when 0.050 M benzoic acid (Ka = 6.6  ×	imes×  10-5) is titrated with 0.05 M NaOH?

Accepted Answer

A)  bromphenol blue,pH range: 3.0-4.5
B)  bromcresol green,pH range: 3.8-5.4
C)  alizarin,pH range: 5.7-7.2
D)  phenol red,pH range: 6.9-8.2
E)  phenolphthalein,pH range: 8.0-10.1 F) A) and D)
G) D) and E)

Question 10

Buffer solutions with the component concentrations shown below were prepared.Which of them should have the lowest pH?

Accepted Answer

A)  [CH3COOH] = 0.25 M,[CH3COO-] = 0.25 M
B)  [CH3COOH] = 0.75 M,[CH3COO-] = 0.75 M
C)  [CH3COOH] = 0.75 M,[CH3COO-] = 0.25 M
D)  [CH3COOH] = 0.25 M,[CH3COO-] = 0.75 M
E)  [CH3COOH] = 1.00 M,[CH3COO-] = 1.00 MF) A) and E)
G) A) and B)

Question 11

Write the ion product expression for silver sulfide,Ag2S.

Accepted Answer

A)  2S. 
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D)  2S. 
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E)  2S. 
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G) D) and E)

Question 12

The solubility of salt MX (solubility product constant Ksp)in water will always be greater than that of salt MX3 (solubility product constant Ksp)provided that Ksp > K'sp.

Accepted Answer

A) True 
 B)False

Question 13

Increasing the concentrations of the components of a buffer solution will increase the buffer range.

Accepted Answer

A) True 
 B)False

Question 14

A buffer is prepared by adding 100 mL of 0.50 M sodium hydroxide to 100 mL of 0.75 M propanoic acid.Is this a buffer solution,and if so,what is its pH?

Accepted Answer

A)  It is a buffer,pH > pKa of propanoic acid.
B)  It is a buffer,pH a of propanoic acid.
C)  It is a buffer,pH = pKa of propanoic acid.
D)  It is a buffer,pH = pKb of sodium propanoate.
E)  Since sodium hydroxide is a strong base,this is not a buffer.F) A) and E)
G) A) and D) A

Question 15

A phosphate buffer (H2PO4-/HPO42-) has a pH of 8.3.Which of the following changes will cause the pH to increase?

Accepted Answer

A)  dissolving a small amount of Na2HPO4
B)  dissolving a small amount of NaH2PO4
C)  adding a small amount of dilute hydrochloric acid
D)  adding a small amount of dilute phosphoric acid
E)  making the buffer more concentrated by removing some waterF) A) and E)
G) B) and D)

Question 16

Formic acid is a monoprotic acid with a Ka value of 1.8 $\times$ 10-4 at 25°C.
a.Calculate the pH of a 0.200 mol L-1 solution of the acid,making any reasonable approximations.
b.If 0.0050 mol of NaOH is added to 100.mL of the solution in (a),calculate the pH of the resultant buffer.

Accepted Answer

a.2.22
b.3.27

Question 17

The concentration of the complex ion in each of following solutions is 1.00 M.In which of the solutions will the concentration of the uncomplexed metal ion be the greatest?
Hg(CN) 42- Kf = 9.3  ×	imes×  1038
Be(OH) 42- Kf = 4.0  ×	imes×  1018
 Zn(OH) 42- Kf = 3.0  ×	imes×  1015
 Cu(NH3) 42+ Kf = 5.6  ×	imes×  1011
 CdI42- Kf = 1.0  ×	imes×  106

Accepted Answer

A)  Hg2+
B)  Be2+
C)  Zn2+
D)  Cu2+
E)  Cd2+ F) A) and E)
G) A) and D)

Question 18

What is the pH of a buffer that consists of 0.45 M CH3COOH and 0.35 M CH3COONa?
Ka = 1.8  ×	imes× 10-5

Accepted Answer

A)  4.49
B)  4.64
C)  4.85
D)  5.00
E)  5.52 F) A) and B)
G) A) and C)

Question 19

Propanoic acid (CH3CH2COOH)has a Ka of 1.34 $\times$10-5.A 25.00 mL sample of 0.1000 mol L-1 propanoic acid (in flask)is titrated with 0.1000 mol L-1 NaOH solution,added from a buret.Carry out the calculations of the quantities indicated below.
a.The pH after 0.00 mL of NaOH are added.
b.The pH after 15.00 mL of NaOH are added.
c.The hydroxide ion concentration after 26.00 mL of NaOH are added.

Accepted Answer

a.2.94
b.5.05
c.1.96...

Question 20

Write the ion product expression for magnesium fluoride,MgF2.

Accepted Answer

A)  2. 
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G) All of the above B

Exam 19: Ionic Equilibria in Aqueous Systems

The solubility of silver chloride _______________ when dilute nitric is added to it.

Correct Answer
verified

A 35.0-mL sample of 0.20 M LiOH is titrated with 0.25 M HCl.What is the pH of the solution after 23.0 mL of HCl have been added to the base?

Correct Answer
verified

What will be the effect of adding 0.5 mL of 0.1 M NaOH to 100 mL of an acetate buffer in which [CH₃COOH] = [CH₃COO^-] = 0.5 M?

Correct Answer
verified

Calculate the solubility of strontium fluoride,SrF₂,in pure water.K_sp = 2.6 $\times$ 10^-9

Correct Answer
verified

Which one of the following is the best representation of the titration curve which will be obtained in the titration of a weak acid (0.10 mol L^-1) with a strong base of the same concentration?

Correct Answer
verified

The lab technician Anna Lytic adds 2.20 mol KOH to 1.00 L of 0.5 M Al(NO₃) ₃.What is the concentration of aluminum ions after the aluminum nitrate has reacted with the potassium hydroxide? K_f = 3.0 $\times$ 10³³ for Al(OH) ₄^-

Correct Answer
verified

When a weak acid is titrated with a weak base,the pH at the equivalence point

Correct Answer
verified

A buffer is prepared by adding 300.0 mL of 2.0 M NaOH to 500.0 mL of 2.0 M CH₃COOH.What is the pH of this buffer? K_a = 1.8 $\times$ 10^-5

Correct Answer
verified

Which of the following indicators would be the best to use when 0.050 M benzoic acid (K_a = 6.6 $\times$ 10^-5) is titrated with 0.05 M NaOH?

Correct Answer
verified

Buffer solutions with the component concentrations shown below were prepared.Which of them should have the lowest pH?

Correct Answer
verified

Write the ion product expression for silver sulfide,Ag₂S.

Correct Answer
verified

The solubility of salt MX (solubility product constant K_sp)in water will always be greater than that of salt MX₃ (solubility product constant K_sp)provided that K_sp > K'_sp.

Correct Answer
verified

Increasing the concentrations of the components of a buffer solution will increase the buffer range.

Correct Answer
verified

A buffer is prepared by adding 100 mL of 0.50 M sodium hydroxide to 100 mL of 0.75 M propanoic acid.Is this a buffer solution,and if so,what is its pH?

Correct Answer
verified
A

A phosphate buffer (H₂PO₄^-/HPO₄^2-) has a pH of 8.3.Which of the following changes will cause the pH to increase?

Correct Answer
verified

Formic acid is a monoprotic acid with a K_a value of 1.8 $\times$ 10^-4 at 25°C. a.Calculate the pH of a 0.200 mol L^-1 solution of the acid,making any reasonable approximations. b.If 0.0050 mol of NaOH is added to 100.mL of the solution in (a),calculate the pH of the resultant buffer.

Correct Answer
verified
a.2.22 b.3.27

Correct Answer
verified

What is the pH of a buffer that consists of 0.45 M CH₃COOH and 0.35 M CH₃COONa? K_a = 1.8 $\times$ 10^-5

Correct Answer
verified

Correct Answer
verified
a.2.94
b.5.05
c.1.96...
View Answer

Write the ion product expression for magnesium fluoride,MgF₂.

Correct Answer
verified
B

Exam 19: Ionic Equilibria in Aqueous Systems

The solubility of silver chloride _______________ when dilute nitric is added to it.

Correct AnswerverifiedShow Answer

A 35.0-mL sample of 0.20 M LiOH is titrated with 0.25 M HCl.What is the pH of the solution after 23.0 mL of HCl have been added to the base?

Correct AnswerverifiedShow Answer

What will be the effect of adding 0.5 mL of 0.1 M NaOH to 100 mL of an acetate buffer in which [CH3COOH] = [CH3COO-] = 0.5 M?

Correct AnswerverifiedShow Answer

Calculate the solubility of strontium fluoride,SrF2,in pure water.Ksp = 2.6 ×\times× 10-9

Correct AnswerverifiedShow Answer

Which one of the following is the best representation of the titration curve which will be obtained in the titration of a weak acid (0.10 mol L-1) with a strong base of the same concentration?

Correct AnswerverifiedShow Answer

The lab technician Anna Lytic adds 2.20 mol KOH to 1.00 L of 0.5 M Al(NO3) 3.What is the concentration of aluminum ions after the aluminum nitrate has reacted with the potassium hydroxide? Kf = 3.0 ×\times× 1033 for Al(OH) 4-

Correct AnswerverifiedShow Answer

When a weak acid is titrated with a weak base,the pH at the equivalence point

Correct AnswerverifiedShow Answer

A buffer is prepared by adding 300.0 mL of 2.0 M NaOH to 500.0 mL of 2.0 M CH3COOH.What is the pH of this buffer? Ka = 1.8 ×\times× 10-5

Correct AnswerverifiedShow Answer

Which of the following indicators would be the best to use when 0.050 M benzoic acid (Ka = 6.6 ×\times× 10-5) is titrated with 0.05 M NaOH?

Correct AnswerverifiedShow Answer

Buffer solutions with the component concentrations shown below were prepared.Which of them should have the lowest pH?

Correct AnswerverifiedShow Answer

Write the ion product expression for silver sulfide,Ag2S.

Correct AnswerverifiedShow Answer

The solubility of salt MX (solubility product constant Ksp)in water will always be greater than that of salt MX3 (solubility product constant Ksp)provided that Ksp > K'sp.

Correct AnswerverifiedShow Answer

Increasing the concentrations of the components of a buffer solution will increase the buffer range.

Correct AnswerverifiedShow Answer

A buffer is prepared by adding 100 mL of 0.50 M sodium hydroxide to 100 mL of 0.75 M propanoic acid.Is this a buffer solution,and if so,what is its pH?

Correct AnswerverifiedA

A phosphate buffer (H2PO4-/HPO42-) has a pH of 8.3.Which of the following changes will cause the pH to increase?

Correct AnswerverifiedShow Answer

Formic acid is a monoprotic acid with a Ka value of 1.8 ×\times× 10-4 at 25°C. a.Calculate the pH of a 0.200 mol L-1 solution of the acid,making any reasonable approximations. b.If 0.0050 mol of NaOH is added to 100.mL of the solution in (a),calculate the pH of the resultant buffer.

Correct Answerverifieda.2.22 b.3.27

Correct AnswerverifiedShow Answer

What is the pH of a buffer that consists of 0.45 M CH3COOH and 0.35 M CH3COONa? Ka = 1.8 ×\times× 10-5

Correct AnswerverifiedShow Answer

Correct Answerverifieda.2.94b.5.05c.1.96...View AnswerShow Answer

Write the ion product expression for magnesium fluoride,MgF2.

Correct AnswerverifiedB

Correct Answer
verified

Correct Answer
verified

What will be the effect of adding 0.5 mL of 0.1 M NaOH to 100 mL of an acetate buffer in which [CH₃COOH] = [CH₃COO^-] = 0.5 M?

Correct Answer
verified

Calculate the solubility of strontium fluoride,SrF₂,in pure water.K_sp = 2.6 $\times$ 10^-9

Correct Answer
verified

Which one of the following is the best representation of the titration curve which will be obtained in the titration of a weak acid (0.10 mol L^-1) with a strong base of the same concentration?

Correct Answer
verified

The lab technician Anna Lytic adds 2.20 mol KOH to 1.00 L of 0.5 M Al(NO₃) ₃.What is the concentration of aluminum ions after the aluminum nitrate has reacted with the potassium hydroxide? K_f = 3.0 $\times$ 10³³ for Al(OH) ₄^-

Correct Answer
verified

Correct Answer
verified

A buffer is prepared by adding 300.0 mL of 2.0 M NaOH to 500.0 mL of 2.0 M CH₃COOH.What is the pH of this buffer? K_a = 1.8 $\times$ 10^-5

Correct Answer
verified

Which of the following indicators would be the best to use when 0.050 M benzoic acid (K_a = 6.6 $\times$ 10^-5) is titrated with 0.05 M NaOH?

Correct Answer
verified

Correct Answer
verified

Write the ion product expression for silver sulfide,Ag₂S.

Correct Answer
verified

The solubility of salt MX (solubility product constant K_sp)in water will always be greater than that of salt MX₃ (solubility product constant K_sp)provided that K_sp > K'_sp.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A

A phosphate buffer (H₂PO₄^-/HPO₄^2-) has a pH of 8.3.Which of the following changes will cause the pH to increase?

Correct Answer
verified

Formic acid is a monoprotic acid with a K_a value of 1.8 $\times$ 10^-4 at 25°C. a.Calculate the pH of a 0.200 mol L^-1 solution of the acid,making any reasonable approximations. b.If 0.0050 mol of NaOH is added to 100.mL of the solution in (a),calculate the pH of the resultant buffer.

Correct Answer
verified
a.2.22 b.3.27

Correct Answer
verified

What is the pH of a buffer that consists of 0.45 M CH₃COOH and 0.35 M CH₃COONa? K_a = 1.8 $\times$ 10^-5

Correct Answer
verified

Correct Answer
verified
a.2.94
b.5.05
c.1.96...
View Answer

Write the ion product expression for magnesium fluoride,MgF₂.

Correct Answer
verified
B