Question 1

A buffer solution contains a mixture of acetic acid (HC2H3O2)and potassium acetate (KC2H3O2).What reaction will take place if H+ is added to this solution?

Accepted Answer

A)  HC2H3O2 (aq)+ H+ (aq)$\rightarrow$H2C2H3O2+ (aq) 
B)  C2H3O2- (aq)+ H+ (aq)$\rightarrow$H2C2H3O2+ (aq) 
C)  KC2H3O2 (aq)+ H+ (aq)$\rightarrow$ KHC2H3O2 (aq) 
D)  C2H3O2- (aq)+ H+ (aq)$\rightarrow$HC2H3O2 (aq) 
A)  HC2H3O2 (aq)+ H+ (aq)$\rightarrow$H2C2H3O2+ (aq) 
B)  C2H3O2- (aq)+ H+ (aq)$\rightarrow$H2C2H3O2+ (aq) 
C)  KC2H3O2 (aq)+ H+ (aq)$\rightarrow$ KHC2H3O2 (aq) 
D)  C2H3O2- (aq)+ H+ (aq)$\rightarrow$HC2H3O2 (aq) D

Question 2

The pH of an unknown solution is 2.1.Its [OH-] is:

Accepted Answer

A)  0.0079 M. 
B)  1.3 × 10-12 M. 
C)  3.2 × 102 M. 
D)  3.2 M. 
A)  0.0079 M. 
B)  1.3 × 10-12 M. 
C)  3.2 × 102 M. 
D)  3.2 M. B

Question 3

A compound that is a proton (H+)donor is a(n):

Accepted Answer

A)  salt. 
B)  solvent. 
C)  base. 
D)  acid. 
A)  salt. 
B)  solvent. 
C)  base. 
D)  acid. D

Question 4

Which statement is FALSE?

Accepted Answer

A)  Buffer systems keep pH within a narrow range. 
B)  A buffer is a solution containing a mixture of acidic and basic components that resist changes in pH. 
C)  An appropriate buffer is a mixture of a strong acid and its conjugate base. 
D)  An appropriate buffer is a mixture of a weak acid and its conjugate base. 
A)  Buffer systems keep pH within a narrow range. 
B)  A buffer is a solution containing a mixture of acidic and basic components that resist changes in pH. 
C)  An appropriate buffer is a mixture of a strong acid and its conjugate base. 
D)  An appropriate buffer is a mixture of a weak acid and its conjugate base.

Question 5

In the following equilibrium,which species is the CONJUGATE BASE of compound b?

Accepted Answer

A)  a 
B)  b 
C)  c 
D)  d 
A)  a 
B)  b 
C)  c 
D)  d

Question 6

Acid and base combine to form:

Accepted Answer

A)  salt and water. 
B)  gas and water. 
C)  salt and gas. 
D)  only ionic compounds. 
A)  salt and water. 
B)  gas and water. 
C)  salt and gas. 
D)  only ionic compounds.

Question 7

What is the pH of a solution if [H+] = 1.0 × 10-9 M?

Accepted Answer

A)  6.0 
B)  9.0 
C)  8.6 
D)  5.4 
A)  6.0 
B)  9.0 
C)  8.6 
D)  5.4

Question 8

An aqueous solution is found to have an H+ concentration of 2.0 × 10-4 M.What is the concentration of OH- in this solution?

Accepted Answer

A)  5.0 × 10-11 M 
B)  2.0 × 10-18 M 
C)  2.0 × 1010 M 
D)  4.0 M 
A)  5.0 × 10-11 M 
B)  2.0 × 10-18 M 
C)  2.0 × 1010 M 
D)  4.0 M

Question 9

Predict the products for HCl (aq)+ NaOH (aq)$\rightarrow$

Accepted Answer

A)  NaCl (aq)+ H2O (l) 
B)  NaCl (aq)+ NaOH (aq) 
C)  NaCl (aq)+ HCl (aq) 
D)  NaCl (aq)+ H2 (g) 
A)  NaCl (aq)+ H2O (l) 
B)  NaCl (aq)+ NaOH (aq) 
C)  NaCl (aq)+ HCl (aq) 
D)  NaCl (aq)+ H2 (g)

Question 10

Which combination would make a buffer solution?

Accepted Answer

A)  0.1 M HCl and 0.1 M NaCl 
B)  0.1 M H2CO3 and 0.1 M NaHCO3 
C)  0.4 M HNO3 and 0.4 M NaNO3 
D)  0.15 M H2SO4 and 0.4 M CaSO4 
A)  0.1 M HCl and 0.1 M NaCl 
B)  0.1 M H2CO3 and 0.1 M NaHCO3 
C)  0.4 M HNO3 and 0.4 M NaNO3 
D)  0.15 M H2SO4 and 0.4 M CaSO4

Question 11

Acids that completely ionize in water are:

Accepted Answer

A)  strong bases. 
B)  weak bases. 
C)  strong acids. 
D)  weak acids. 
A)  strong bases. 
B)  weak bases. 
C)  strong acids. 
D)  weak acids.

Question 12

Which solution will turn litmus paper blue?

Accepted Answer

A)  0.5 M NaOH 
B)  2.1 M HCl 
C)  4.5 M HC2H3O2 
D)  0.125 M HBr 
A)  0.5 M NaOH 
B)  2.1 M HCl 
C)  4.5 M HC2H3O2 
D)  0.125 M HBr

Question 13

Acids that partially ionize in water are:

Accepted Answer

A)  strong bases. 
B)  weak bases. 
C)  strong acids. 
D)  weak acids. 
A)  strong bases. 
B)  weak bases. 
C)  strong acids. 
D)  weak acids.

Question 14

A 25.0-mL sample of HBr is neutralized by reaction with 20.0 mL of 3.00 M KOH.What is the concentration of HBr in the unknown sample?

Accepted Answer

A)  3.8 M 
B)  2.4 M 
C)  1.7 M 
D)  0.55 M 
A)  3.8 M 
B)  2.4 M 
C)  1.7 M 
D)  0.55 M

Question 15

Which combination would make the MOST effective buffer solution?

Accepted Answer

A)  0.1 M H2CO3 and 1.0 M NaHCO3 
B)  0.1 M H2CO3 and 0.1 M NaHCO3 
C)  0.1 M H2CO3 and 2.0 M NaHCO3 
D)  0.15 M H2CO3 and 0.015 M NaHCO3 
A)  0.1 M H2CO3 and 1.0 M NaHCO3 
B)  0.1 M H2CO3 and 0.1 M NaHCO3 
C)  0.1 M H2CO3 and 2.0 M NaHCO3 
D)  0.15 M H2CO3 and 0.015 M NaHCO3

Question 16

The pH of an unknown solution is 8.5.Its [OH-] is:

Accepted Answer

A)  3.2 × 10-6 M. 
B)  3.2 × 10-9 M. 
C)  3.2 × 105 M. 
D)  3.2 M. 
A)  3.2 × 10-6 M. 
B)  3.2 × 10-9 M. 
C)  3.2 × 105 M. 
D)  3.2 M.

Question 17

The neutralization reaction of barium hydroxide with aqueous hydrochloric acid (HCl)leads to what two products?

Accepted Answer

A)  H2O and BaCl 
B)  Ba(ClO2)2 and H2 
C)  HCl and BaOCl 
D)  BaCl2 and H2O 
A)  H2O and BaCl 
B)  Ba(ClO2)2 and H2 
C)  HCl and BaOCl 
D)  BaCl2 and H2O

Question 18

In the following equilibrium,which species is the CONJUGATE BASE of compound a?

Accepted Answer

A)  a 
B)  b 
C)  c 
D)  d 
A)  a 
B)  b 
C)  c 
D)  d

Question 19

The net ionic equation for the reaction Cu (s)+ 2 HNO3 (aq)$\rightarrow$H2(g)+ Cu(NO3)2 (aq)is:

Accepted Answer

A)  Cu (s)+ H+ (aq)$\rightarrow$ H2(g)+ Cu2+ (aq). 
B)  Cu (s)+ 2 H+ (aq)$\rightarrow$H2(g)+ Cu2+ (aq). 
C)  Cu (s)+ 2 H+ (aq)$\rightarrow$H2(g)+ Cu+ (aq). 
D)  Cu (s)+ H+ (aq)$\rightarrow$H2(g)+ Cu+ (aq). 
A)  Cu (s)+ H+ (aq)$\rightarrow$ H2(g)+ Cu2+ (aq). 
B)  Cu (s)+ 2 H+ (aq)$\rightarrow$H2(g)+ Cu2+ (aq). 
C)  Cu (s)+ 2 H+ (aq)$\rightarrow$H2(g)+ Cu+ (aq). 
D)  Cu (s)+ H+ (aq)$\rightarrow$H2(g)+ Cu+ (aq).

Question 20

Which acid can undergo up to a second ionization?

Accepted Answer

A)  H2SO4 (aq) 
B)  HNO3 (aq) 
C)  HNO2 (aq) 
D)  HCl (aq) 
A)  H2SO4 (aq) 
B)  HNO3 (aq) 
C)  HNO2 (aq) 
D)  HCl (aq)

A buffer solution contains a mixture of acetic acid (HC₂H₃O₂)and potassium acetate (KC₂H₃O₂).What reaction will take place if H⁺ is added to this solution?

The pH of an unknown solution is 2.1.Its [OH^-] is:

A compound that is a proton (H⁺)donor is a(n):

Which statement is FALSE?

In the following equilibrium,which species is the CONJUGATE BASE of compound b?

Acid and base combine to form:

What is the pH of a solution if [H⁺] = 1.0 × 10^-⁹ M?

An aqueous solution is found to have an H⁺ concentration of 2.0 × 10^-⁴ M.What is the concentration of OH^- in this solution?

Predict the products for HCl (aq)+ NaOH (aq) $\rightarrow$

Which combination would make a buffer solution?

Acids that completely ionize in water are:

Which solution will turn litmus paper blue?

Acids that partially ionize in water are:

A 25.0-mL sample of HBr is neutralized by reaction with 20.0 mL of 3.00 M KOH.What is the concentration of HBr in the unknown sample?

Which combination would make the MOST effective buffer solution?

The pH of an unknown solution is 8.5.Its [OH^-] is:

The neutralization reaction of barium hydroxide with aqueous hydrochloric acid (HCl)leads to what two products?

In the following equilibrium,which species is the CONJUGATE BASE of compound a?

The net ionic equation for the reaction Cu (s)+ 2 HNO₃ (aq) $\rightarrow$ H₂(g)+ Cu(NO₃)₂ (aq)is:

Which acid can undergo up to a second ionization?

Foundations

Measurement

Atoms

Light and Electronic Structure

Chemical Bonds Compounds

Chemical Reactions

Mass Stoichiometry

Energy

Covalent Bonding and Molecules

Solids, Liquids, and Gases

Solutions

Reaction Rates Equilibrium

Oxidation-Reduction Reactions

Organic Chemistry and Biomolecules

Nuclear Chemistry

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Exam 12: Acids Bases

A buffer solution contains a mixture of acetic acid (HC2H3O2)and potassium acetate (KC2H3O2).What reaction will take place if H+ is added to this solution?

The pH of an unknown solution is 2.1.Its [OH-] is:

A compound that is a proton (H+)donor is a(n):

Which statement is FALSE?

In the following equilibrium,which species is the CONJUGATE BASE of compound b?

Acid and base combine to form:

What is the pH of a solution if [H+] = 1.0 × 10-9 M?

An aqueous solution is found to have an H+ concentration of 2.0 × 10-4 M.What is the concentration of OH- in this solution?

Predict the products for HCl (aq)+ NaOH (aq) →\rightarrow→

Which combination would make a buffer solution?

Acids that completely ionize in water are:

Which solution will turn litmus paper blue?

Acids that partially ionize in water are:

A 25.0-mL sample of HBr is neutralized by reaction with 20.0 mL of 3.00 M KOH.What is the concentration of HBr in the unknown sample?

Which combination would make the MOST effective buffer solution?

The pH of an unknown solution is 8.5.Its [OH-] is:

The neutralization reaction of barium hydroxide with aqueous hydrochloric acid (HCl)leads to what two products?

In the following equilibrium,which species is the CONJUGATE BASE of compound a?

The net ionic equation for the reaction Cu (s)+ 2 HNO3 (aq) →\rightarrow→ H2(g)+ Cu(NO3)2 (aq)is:

Which acid can undergo up to a second ionization?

Foundations

Measurement

Atoms

Light and Electronic Structure

Chemical Bonds Compounds

Chemical Reactions

Mass Stoichiometry

Energy

Covalent Bonding and Molecules

Solids, Liquids, and Gases

Solutions

Reaction Rates Equilibrium

Oxidation-Reduction Reactions

Organic Chemistry and Biomolecules

Nuclear Chemistry

Filters

A buffer solution contains a mixture of acetic acid (HC₂H₃O₂)and potassium acetate (KC₂H₃O₂).What reaction will take place if H⁺ is added to this solution?

The pH of an unknown solution is 2.1.Its [OH^-] is:

A compound that is a proton (H⁺)donor is a(n):

What is the pH of a solution if [H⁺] = 1.0 × 10^-⁹ M?

An aqueous solution is found to have an H⁺ concentration of 2.0 × 10^-⁴ M.What is the concentration of OH^- in this solution?

Predict the products for HCl (aq)+ NaOH (aq) $\rightarrow$

The pH of an unknown solution is 8.5.Its [OH^-] is:

The net ionic equation for the reaction Cu (s)+ 2 HNO₃ (aq) $\rightarrow$ H₂(g)+ Cu(NO₃)₂ (aq)is: