Question 1

The pH of an aqueous solution at 25.0°C is 10.66.What is the molarity of   in this solution?

Accepted Answer

A)  2.2 × 10-11 
B)  4.6 × 10-4 
C)  3.3 
D)  1.1 × 10-13 
E)  4.6 × 1010 
A)  2.2 × 10-11 
B)  4.6 × 10-4 
C)  3.3 
D)  1.1 × 10-13 
E)  4.6 × 1010

Question 2

What is the pH of a 0.0040 M Sr(OH)2 solution?

Accepted Answer

A)  2.10 
B)  2.40 
C)  11.60 
D)  11.90 
E)  12.00 
A)  2.10 
B)  2.40 
C)  11.60 
D)  11.90 
E)  12.00

Question 3

Identify the weak monoprotic acid.

Accepted Answer

A)  H2CO3 
B)  NaOH 
C)  HCOOH  
D)  HI  
E)  KBr 
A)  H2CO3 
B)  NaOH 
C)  HCOOH  
D)  HI  
E)  KBr

Question 4

Identify the strongest acid.

Accepted Answer

A)  HFO4 
B)  HFO3 
C)  HFO2 
D)  HFO 
E)  Not enough information is given. 
A)  HFO4 
B)  HFO3 
C)  HFO2 
D)  HFO 
E)  Not enough information is given.

Question 5

Determine the Ka of an acid whose 0.294 M solution has a pH of 2.80.

Accepted Answer

A)  1.2 × 10-5 
B)  8.5 × 10-6 
C)  2.7 
D)  4.9 × 10-7 
E)  5.4 × 10-3 
A)  1.2 × 10-5 
B)  8.5 × 10-6 
C)  2.7 
D)  4.9 × 10-7 
E)  5.4 × 10-3

Question 6

Which of the following species is amphoteric?

Accepted Answer

A)  SO42- 
B)  HF 
C)  NH4+ 
D)  HPO42- 
E)  LiI 
A)  SO42- 
B)  HF 
C)  NH4+ 
D)  HPO42- 
E)  LiI

Question 7

What is the pH of a 0.40 M H2Se solution that has the stepwise dissociation constants Ka1 = 1.3 × 10-4 and Ka2 = 1.0 × 10-11?

Accepted Answer

A)  2.14 
B)  3.89 
C)  4.28 
D)  5.57 
A)  2.14 
B)  3.89 
C)  4.28 
D)  5.57

Question 8

Calculate the hydronium ion concentration in an aqueous solution with a pOH of 4.33 at 25°C.

Accepted Answer

A)  2.1 × 10-10 M 
B)  9.7 × 10-10 M 
C)  4.7 × 10-5 M 
D)  3.8 × 10-5 M 
E)  6.3 × 10-6 M 
A)  2.1 × 10-10 M 
B)  9.7 × 10-10 M 
C)  4.7 × 10-5 M 
D)  3.8 × 10-5 M 
E)  6.3 × 10-6 M

Question 9

Which one of the following salts,when 1 mole is dissolved in water,produces the solution with a pH closest to 7.00?

Accepted Answer

A)  NH4ClO4 
B)  Na2O 
C)  NaHSO4 
D)  NaF 
E)  NaOH 
A)  NH4ClO4 
B)  Na2O 
C)  NaHSO4 
D)  NaF 
E)  NaOH

Question 10

List an ingredient that is in antacid.

Accepted Answer

A)  Al(OH)3 
B)  Mg(OH)2 
C)  CaCO3 
D)  all of the above 
E)  none of the above 
A)  Al(OH)3 
B)  Mg(OH)2 
C)  CaCO3 
D)  all of the above 
E)  none of the above

Question 11

Which of the following is a Br∅nsted-Lowry acid?

Accepted Answer

A)  NH4+ 
B)  CBr4 
C)  PH2- 
D)  NH3 
E)  F2 
A)  NH4+ 
B)  CBr4 
C)  PH2- 
D)  NH3 
E)  F2

Question 12

Determine the [OH⁻] concentration in a 0.344 M Ba(OH)2 solution.

Accepted Answer

A)  0.688 M 
B)  0.344 M 
C)  0.463 
D)  0.334 
E)  13.666 
A)  0.688 M 
B)  0.344 M 
C)  0.463 
D)  0.334 
E)  13.666

Question 13

Which of the following is a strong base?

Accepted Answer

A)  Br- 
B)  NH2CH2CH3 
C)  CH3OH 
D)  NO3⁻ 
E)  NaOH 
A)  Br- 
B)  NH2CH2CH3 
C)  CH3OH 
D)  NO3⁻ 
E)  NaOH

Question 14

The stomach excretes ________ to kill microorganisms and to activate enzymes that break down food.

Accepted Answer

A)  H2CO3 
B)  HBr 
C)  KHCO3 
D)  HCl 
E)  HNO3 
A)  H2CO3 
B)  HBr 
C)  KHCO3 
D)  HCl 
E)  HNO3

Question 15

Determine the pH of a 0.00598 M HClO4 solution.

Accepted Answer

A)  11.777 
B)  6.434 
C)  7.566 
D)  2.223 
E)  3.558 
A)  11.777 
B)  6.434 
C)  7.566 
D)  2.223 
E)  3.558

Question 16

Determine the pH of a 0.232 M Mg(OH)2 solution at 25°C.

Accepted Answer

A)  12.73 
B)  13.37 
C)  13.67 
D)  0.333 
E)  0.634 
A)  12.73 
B)  13.37 
C)  13.67 
D)  0.333 
E)  0.634

Question 17

Which of the following is a strong acid?

Accepted Answer

A)  H   COOH 
B)  HF 
C)  HI  
D)  NH4+ 
E)  H2S 
A)  H   COOH 
B)  HF 
C)  HI  
D)  NH4+ 
E)  H2S

Question 18

What is the difference between a strong and weak acid?

Accepted Answer

A strong acid ionizes/dissocia

Question 19

Give the characteristics of a strong acid.

Accepted Answer

A)  ionizes completely in aqueous solutions 
B)  has equilibrium far to the right 
C)  has a polar bond 
D)  has a weaker bond to hydrogen 
E)  all of the above 
A)  ionizes completely in aqueous solutions 
B)  has equilibrium far to the right 
C)  has a polar bond 
D)  has a weaker bond to hydrogen 
E)  all of the above

Question 20

Determine the pH of a 0.62 M NH4NO3 solution at 25°C.The Kb for NH3 is 1.76 × 10-5.

Accepted Answer

A)  2.48 
B)  9.27 
C)  11.52 
D)  4.73 
E)  9.45 
A)  2.48 
B)  9.27 
C)  11.52 
D)  4.73 
E)  9.45

Exam 16: Acids and Bases

The pH of an aqueous solution at 25.0°C is 10.66.What is the molarity of in this solution?

What is the pH of a 0.0040 M Sr(OH)2 solution?

Identify the weak monoprotic acid.

Identify the strongest acid.

Determine the Ka of an acid whose 0.294 M solution has a pH of 2.80.

Which of the following species is amphoteric?

What is the pH of a 0.40 M H2Se solution that has the stepwise dissociation constants Ka1 = 1.3 × 10-4 and Ka2 = 1.0 × 10-11?

Calculate the hydronium ion concentration in an aqueous solution with a pOH of 4.33 at 25°C.

Which one of the following salts,when 1 mole is dissolved in water,produces the solution with a pH closest to 7.00?

List an ingredient that is in antacid.

Which of the following is a Br∅nsted-Lowry acid?

Determine the [OH⁻] concentration in a 0.344 M Ba(OH)2 solution.

Which of the following is a strong base?

The stomach excretes ________ to kill microorganisms and to activate enzymes that break down food.

Determine the pH of a 0.00598 M HClO4 solution.

Determine the pH of a 0.232 M Mg(OH)2 solution at 25°C.

Which of the following is a strong acid?

What is the difference between a strong and weak acid?

Give the characteristics of a strong acid.

Determine the pH of a 0.62 M NH4NO3 solution at 25°C.The Kb for NH3 is 1.76 × 10-5.

Matter, measurement, and Problem Solving

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Molecules,compounds,and Chemical Equations

Chemical Quantities and Aqueous Reactions

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes,valence Bond Theory,

Liquids,solids,and Intermolecular Forces

Solids and Modern Materials

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Chemical Kinetics

Chemical Equilibrium

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

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Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

What is the pH of a 0.0040 M Sr(OH)₂ solution?

Determine the K_a of an acid whose 0.294 M solution has a pH of 2.80.

What is the pH of a 0.40 M H₂Se solution that has the stepwise dissociation constants K_a1 = 1.3 × 10^-4 and K_a2 = 1.0 × 10^-11?

Determine the [OH⁻] concentration in a 0.344 M Ba(OH)₂ solution.

Determine the pH of a 0.00598 M HClO₄ solution.

Determine the pH of a 0.232 M Mg(OH)₂ solution at 25°C.

Determine the pH of a 0.62 M NH₄NO₃ solution at 25°C.The K_b for NH₃ is 1.76 × 10^-5.