Question 1

The pH of an aqueous solution at 25.0°C is 10.66.What is the molarity of H+ 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

Calculate the pOH of a solution that contains 3.9 × 10-4 M H3O⁺ at 25°C.

Accepted Answer

A) 4.59 
B) 3.31 
C) 10.59 
D) 9.14 
E) 0.59 
A) 4.59 
B) 3.31 
C) 10.59 
D) 9.14 
E) 0.59

Question 3

Match the following.
-Br∅nsted-Lowry acid

Accepted Answer

A) electron pair donor 
B) proton donor 
C) produces protons in aqueous solution 
D) produces hydroxide ions in aqueous solution 
E) electron pair acceptor
F)proton acceptor 
A) electron pair donor 
B) proton donor 
C) produces protons in aqueous solution 
D) produces hydroxide ions in aqueous solution 
E) electron pair acceptor
F)proton acceptor

Question 4

Do both protons ionize instantaneously from a diprotic acid such as H2CO3? Explain your answer.

Accepted Answer

No.Polyprotic acids ionize in stages.A s

Question 5

Determine the pH of a 0.023 M HNO3 solution.

Accepted Answer

A) 12.36 
B) 3.68 
C) 1.64 
D) 2.30 
E) 2.49 
A) 12.36 
B) 3.68 
C) 1.64 
D) 2.30 
E) 2.49

Question 6

The acid-dissociation constant of hydrocyanic acid (HCN)at 25.0°C is 4.9 × 10-10.What is the pH of an aqueous solution of 0.080 M sodium cyanide (NaCN)?

Accepted Answer

A) 11.11 
B) 2.89 
C) 1.3 × 10-3 
D) 7.8 × 10-12 
E) 3.9 × 10-11 
A) 11.11 
B) 2.89 
C) 1.3 × 10-3 
D) 7.8 × 10-12 
E) 3.9 × 10-11

Question 7

Match the following.
-Arrhenius base

Accepted Answer

A) electron pair donor 
B) proton donor 
C) produces protons in aqueous solution 
D) produces hydroxide ions in aqueous solution 
E) electron pair acceptor
F)proton acceptor 
A) electron pair donor 
B) proton donor 
C) produces protons in aqueous solution 
D) produces hydroxide ions in aqueous solution 
E) electron pair acceptor
F)proton acceptor

Question 8

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

Accepted Answer

A) NH4I  
B) NaO 
C) KHCO3   
D) CsCl 
A) NH4I  
B) NaO 
C) KHCO3   
D) CsCl

Question 9

If an equal number of moles of the weak acid HClO and the strong base NaOH are added to water,is the resulting solution acidic,basic,or neutral?

Accepted Answer

A) acidic 
B) basic 
C) neutral 
D) There is insufficient information provided to answer this question. 
A) acidic 
B) basic 
C) neutral 
D) There is insufficient information provided to answer this question.

Question 10

Determine the pH of a 0.22 M NaF solution at 25°C.The Ka of HF is 3.5 × 10-5.

Accepted Answer

A) 10.20 
B) 5.10 
C) 8.90 
D) 11.44 
E) 2.56 
A) 10.20 
B) 5.10 
C) 8.90 
D) 11.44 
E) 2.56

Question 11

Which of the following is true?

Accepted Answer

A) A neutral solution contains [H2O] = [H3O⁺] 
B) A neutral solution does not contain any H3O+ or OH- 
C) An acidic solution has [H3O⁺] > [OH⁻] 
D) A basic solution does not contain H3O+ 
E) None of the above are true. 
A) A neutral solution contains [H2O] = [H3O⁺] 
B) A neutral solution does not contain any H3O+ or OH- 
C) An acidic solution has [H3O⁺] > [OH⁻] 
D) A basic solution does not contain H3O+ 
E) None of the above are true.

Question 12

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

Question 13

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 14

Which of the following is a Lewis acid?

Accepted Answer

A) BCl3 
B) CH4 
C) NH3 
D) CHCl3 
E) None of the above are Lewis acids. 
A) BCl3 
B) CH4 
C) NH3 
D) CHCl3 
E) None of the above are Lewis acids.

Question 15

Which of the following is a polyprotic acid?

Accepted Answer

A) HF 
B) H2SO4 
C) HCN 
D) CH4 
E) HC2H3O2 
A) HF 
B) H2SO4 
C) HCN 
D) CH4 
E) HC2H3O2

Question 16

Which of the following is a strong acid?

Accepted Answer

A) C6H5CO2H 
B) HCN 
C) HClO4 
D) NH4+ 
E) H2O 
A) C6H5CO2H 
B) HCN 
C) HClO4 
D) NH4+ 
E) H2O

Question 17

Which of the following is a weak base?

Accepted Answer

A) NH(CH3)2 
B) N2 
C) NaOH 
D) CH2CH2 
E) None of the above are weak bases. 
A) NH(CH3)2 
B) N2 
C) NaOH 
D) CH2CH2 
E) None of the above are weak bases.

Question 18

Identify the acid that is in car batteries.

Accepted Answer

A) H2SO4 
B) HNO3 
C) H2CO3 
D) CH3COOH 
E) HBr 
A) H2SO4 
B) HNO3 
C) H2CO3 
D) CH3COOH 
E) HBr

Question 19

If an equal number of moles of the weak acid HCN and the strong base KOH are added to water,is the resulting solution acidic,basic,or neutral?

Accepted Answer

A) acidic 
B) basic 
C) neutral 
D) There is insufficient information provided to answer this question. 
A) acidic 
B) basic 
C) neutral 
D) There is insufficient information provided to answer this question.

Question 20

Determine the pH of a 0.227 M C5H5N solution at 25°C.The Kb of C5H5N is 1.7 × 10-9.

Accepted Answer

A) 4.59 
B) 9.41 
C) 4.71 
D) 10.14 
E) 9.29 
A) 4.59 
B) 9.41 
C) 4.71 
D) 10.14 
E) 9.29

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

Calculate the pOH of a solution that contains 3.9 × 10^-4 M H₃O^⁺ at 25°C.

Match the following. -Br∅nsted-Lowry acid

Do both protons ionize instantaneously from a diprotic acid such as H₂CO₃? Explain your answer.

Determine the pH of a 0.023 M HNO₃ solution.

The acid-dissociation constant of hydrocyanic acid (HCN)at 25.0°C is 4.9 × 10^-10.What is the pH of an aqueous solution of 0.080 M sodium cyanide (NaCN)?

Match the following. -Arrhenius base

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

If an equal number of moles of the weak acid HClO and the strong base NaOH are added to water,is the resulting solution acidic,basic,or neutral?

Determine the pH of a 0.22 M NaF solution at 25°C.The K_a of HF is 3.5 × 10^-5.

Which of the following is true?

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

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

Which of the following is a Lewis acid?

Which of the following is a polyprotic acid?

Which of the following is a strong acid?

Which of the following is a weak base?

Identify the acid that is in car batteries.

If an equal number of moles of the weak acid HCNand the strong base KOH are added to water,is the resulting solution acidic,basic,or neutral?

Determine the pH of a 0.227 M C₅H₅N solution at 25°C.The K_b of C₅H₅N is 1.7 × 10^-9.

Matter, Measurement, and Problem Solving

Atoms and Elements

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, and

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

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Exam 15: Acids and Bases

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

Calculate the pOH of a solution that contains 3.9 × 10-4 M H3O⁺ at 25°C.

Match the following. -Br∅nsted-Lowry acid

Do both protons ionize instantaneously from a diprotic acid such as H2CO3? Explain your answer.

Determine the pH of a 0.023 M HNO3 solution.

The acid-dissociation constant of hydrocyanic acid (HCN)at 25.0°C is 4.9 × 10-10.What is the pH of an aqueous solution of 0.080 M sodium cyanide (NaCN)?

Match the following. -Arrhenius base

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

If an equal number of moles of the weak acid HClO and the strong base NaOH are added to water,is the resulting solution acidic,basic,or neutral?

Determine the pH of a 0.22 M NaF solution at 25°C.The Ka of HF is 3.5 × 10-5.

Which of the following is true?

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

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

Which of the following is a Lewis acid?

Which of the following is a polyprotic acid?

Which of the following is a strong acid?

Which of the following is a weak base?

Identify the acid that is in car batteries.

If an equal number of moles of the weak acid HCN and the strong base KOH are added to water,is the resulting solution acidic,basic,or neutral?

Determine the pH of a 0.227 M C5H5N solution at 25°C.The Kb of C5H5N is 1.7 × 10-9.

Matter, Measurement, and Problem Solving

Atoms and Elements

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, and

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Filters

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

Calculate the pOH of a solution that contains 3.9 × 10^-4 M H₃O^⁺ at 25°C.

Do both protons ionize instantaneously from a diprotic acid such as H₂CO₃? Explain your answer.

Determine the pH of a 0.023 M HNO₃ solution.

The acid-dissociation constant of hydrocyanic acid (HCN)at 25.0°C is 4.9 × 10^-10.What is the pH of an aqueous solution of 0.080 M sodium cyanide (NaCN)?

Determine the pH of a 0.22 M NaF solution at 25°C.The K_a of HF is 3.5 × 10^-5.

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

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

If an equal number of moles of the weak acid HCNand the strong base KOH are added to water,is the resulting solution acidic,basic,or neutral?

Determine the pH of a 0.227 M C₅H₅N solution at 25°C.The K_b of C₅H₅N is 1.7 × 10^-9.