Question 1

Wa ter acts as  _____.

Accepted Answer

A)  a proton donor 
B)  a proton acceptor 
C)  either a proton donor or a proton acceptor 
D)  neither a proton donor nor a proton acceptor 
E)  none of these 
A)  a proton donor 
B)  a proton acceptor 
C)  either a proton donor or a proton acceptor 
D)  neither a proton donor nor a proton acceptor 
E)  none of these

Question 2

Rank these compounds in order of increasing acidity (from the least acidic to the most acidic). ​
1.0 M HCOOH, 1.0 M HCl, 1.0 M NH3 , 1.0 M NaOH

Accepted Answer

A)  1.0 M HCOOH 3 3 3 3 3 < 1.0 M NaOH < 1.0 M HCOOH < 1.0 M HCl 
A)  1.0 M HCOOH 3 3 3 3 3 < 1.0 M NaOH < 1.0 M HCOOH < 1.0 M HCl

Question 3

For every change of one unit on the pH scale, the H3O+ concentration changes by a factor of _____.

Accepted Answer

A)  1 
B)  10 
C)  100 
D)  0.1 
E)  0.01 
A)  1 
B)  10 
C)  100 
D)  0.1 
E)  0.01

Question 4

Which of these sets indicating relative acid strength is correct ?

Accepted Answer

A)  NH3 > H2CO3 
B)  HCOOH > H2SO4 
C)  HCl > CH3COOH 
D)  C6H5COOH > HNO3 
E)  C5H5N > H3PO4 
A)  NH3 > H2CO3 
B)  HCOOH > H2SO4 
C)  HCl > CH3COOH 
D)  C6H5COOH > HNO3 
E)  C5H5N > H3PO4

Question 5

The formula of the hydroxide ion is _____.

Accepted Answer

A)  OHS1U1P1 ? S1S1P0 
B)  OHS1U1P1+S1S1P0 
C)  HS1U1B13S1U1B0OS1U1P1+S1S1P0 
D)  HS1U1B13S1U1B0 OS1U1P1?S1S1P0 
E)  OHS1U1P12S1S1P0 ? S1S1P0 
A)  OHS1U1P1 ? S1S1P0 
B)  OHS1U1P1+S1S1P0 
C)  HS1U1B13S1U1B0OS1U1P1+S1S1P0 
D)  HS1U1B13S1U1B0 OS1U1P1?S1S1P0 
E)  OHS1U1P12S1S1P0 ? S1S1P0

Question 6

Which of these substances is a weak base?

Accepted Answer

A)  HCN 
B)  CH3COOH 
C)  HCl 
D)  HCOOH 
E)  C5H5N 
A)  HCN 
B)  CH3COOH 
C)  HCl 
D)  HCOOH 
E)  C5H5N

Question 7

Which of these statements concerning pure water is incorrect ?

Accepted Answer

A)  Its pH is 7 at 25oC. 
B)  It contains no ions. 
C)  It is neutral. 
D)  It can act as a proton acceptor. 
E)  None of these 
A)  Its pH is 7 at 25oC. 
B)  It contains no ions. 
C)  It is neutral. 
D)  It can act as a proton acceptor. 
E)  None of these

Question 8

Which of these is the best definition of an Arrhenius base?

Accepted Answer

A)  Any substance that produces H+ ions in solution 
B)  Any substance that produces OH −  ions in solution 
C)  Any substance that accepts a lone pair of electrons 
D)  Any substance that neutralizes an acid in solution 
E)  Any substance that accepts H+ ions in solution 
A)  Any substance that produces H+ ions in solution 
B)  Any substance that produces OH −  ions in solution 
C)  Any substance that accepts a lone pair of electrons 
D)  Any substance that neutralizes an acid in solution 
E)  Any substance that accepts H+ ions in solution

Question 9

Which of these substances is a base?

Accepted Answer

A)  NaHCO3 
B)  HCl 
C)  HNO3 
D)  H3PO4 
E)  CH3COOH 
A)  NaHCO3 
B)  HCl 
C)  HNO3 
D)  H3PO4 
E)  CH3COOH

Question 10

Which of these has the smallest [H3O+]?

Accepted Answer

A)  pH = 2 
B)  pH = 5 
C)  pH = 7 
D)  pH = 11 
E)  pH = 13 
A)  pH = 2 
B)  pH = 5 
C)  pH = 7 
D)  pH = 11 
E)  pH = 13

Question 11

Which of these compounds can not act as a Bronsted-Lowry acid?

Accepted Answer

A)  H3O+ 
B)  H2O 
C)  CH3COOH 
D)  MgO 
E)  NH3 
A)  H3O+ 
B)  H2O 
C)  CH3COOH 
D)  MgO 
E)  NH3

Question 12

Which of these pairs represents the products of the dissociation of the following salt in solution?
NaHCO3 = _____ + _____

Accepted Answer

A)  NaOH, CO2 
B)  OH − , NaCO+ 
C)  NaH2+, CO32 +  
D)  Na+, HCO3 −  
E)  H2O, CO 
A)  NaOH, CO2 
B)  OH − , NaCO+ 
C)  NaH2+, CO32 +  
D)  Na+, HCO3 −  
E)  H2O, CO

Question 13

Which of these methods of reducing SO2 emissions employs spraying limestone and water in coal smokestacks?

Accepted Answer

A)  Crushing and washing 
B)  Vaporizing and condensing 
C)  Subliming 
D)  Flue gas scrubbers 
E)  None of these 
A)  Crushing and washing 
B)  Vaporizing and condensing 
C)  Subliming 
D)  Flue gas scrubbers 
E)  None of these

Question 14

What is the pH of a 1.0 M solution of a strong acid?

Accepted Answer

A)  0 
B)  5.00 
C)  13.00 
D)  14.00 
E)  7.00 
A)  0 
B)  5.00 
C)  13.00 
D)  14.00 
E)  7.00

Wa ter acts as _____.

Rank these compounds in order of increasing acidity (from the least acidic to the most acidic). 1.0 M HCOOH, 1.0 M HCl, 1.0 M NH₃ , 1.0 M NaOH

For every change of one unit on the pH scale, the H₃O⁺ concentration changes by a factor of _____.

Which of these sets indicating relative acid strength is correct ?

The formula of the hydroxide ion is _____.

Which of these substances is a weak base?

Which of these statements concerning pure water is incorrect ?

Which of these is the best definition of an Arrhenius base?

Which of these substances is a base?

Which of these has the smallest [H₃O⁺]?

Which of these compounds can not act as a Bronsted-Lowry acid?

Which of these pairs represents the products of the dissociation of the following salt in solution? NaHCO₃ = _ + _

Which of these methods of reducing SO₂ emissions employs spraying limestone and water in coal smokestacks?

What is the pH of a 1.0 M solution of a strong acid?

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Exam 13: Acids and Bases: the Molecules Responsible for Sour and Bitter

Wa ter acts as _____.

Rank these compounds in order of increasing acidity (from the least acidic to the most acidic). ​ 1.0 M HCOOH, 1.0 M HCl, 1.0 M NH3 , 1.0 M NaOH

For every change of one unit on the pH scale, the H3O+ concentration changes by a factor of _____.

Which of these sets indicating relative acid strength is correct ?

The formula of the hydroxide ion is _____.

Which of these substances is a weak base?

Which of these statements concerning pure water is incorrect ?

Which of these is the best definition of an Arrhenius base?

Which of these substances is a base?

Which of these has the smallest [H3O+]?

Which of these compounds can not act as a Bronsted-Lowry acid?

Which of these pairs represents the products of the dissociation of the following salt in solution? NaHCO3 = _____ + _____

Which of these methods of reducing SO2 emissions employs spraying limestone and water in coal smokestacks?

What is the pH of a 1.0 M solution of a strong acid?

Molecular Reasons

The Chemists Toolbox

Atoms and Elements

Molecules, Compounds, and Chemical Reactions

Chemical Bonding

Organic Chemistry

Light and Color

Nuclear Chemistry

Energy for Today

Energy for Tomorrow: Solar and Other Renewable Energy Sources

The Air Around Us

The Liquids and Solids Around Us: Especially Water

Oxidation and Reduction

The Chemistry of Household Products

Biochemistry and Biotechnology

Drugs and Medicine: Healing, Helping, and Hurting

The Chemistry of Food

Nanotechnology Online Only

Filters

Rank these compounds in order of increasing acidity (from the least acidic to the most acidic). 1.0 M HCOOH, 1.0 M HCl, 1.0 M NH₃ , 1.0 M NaOH

For every change of one unit on the pH scale, the H₃O⁺ concentration changes by a factor of _____.

Which of these has the smallest [H₃O⁺]?

Which of these pairs represents the products of the dissociation of the following salt in solution? NaHCO₃ = _ + _

Which of these methods of reducing SO₂ emissions employs spraying limestone and water in coal smokestacks?