Question 1

The English are fond of soggy French fries ("chips")wrapped in old newspaper and generously drenched in vinegar,which is a 0.83 M solution of acetic acid.If the acetic acid in vinegar is 0.47% dissociated,calculate K_a for this acid.

Accepted Answer

The answer of The English are fond of soggy French...

Question 2

The substance (CH3CH2)2NH is considered

Accepted Answer

A) a weak acid. 
B) a weak base. 
C) a strong acid. 
D) a strong base. 
E) a neutral compound.

Question 3

What is the pOH of a 0.0250 M HI solution?

Accepted Answer

A) 0.944 
B) 1.602 
C) 12.398 
D) 13.056 
E) None of these choices is correct.

Question 4

What is the pH of a 0.75 M HNO3 solution?

Accepted Answer

A) 0.12 
B) 0.29 
C) 0.63 
D) 0.82 
E) > 1.0

Question 5

Which of the following aqueous liquids will have the highest pH?

Accepted Answer

A) 0.1 M CH3COOH,pKa = 4.7 
B) 0.1 M CuCl2,pKa = 7.5 
C) 0.1 M H3C6H5O7,pKa = 3.1 
D) 0.1 M ZnCl2,pKa = 9.0 
E) pure water

Question 6

Which one of the following substances will give an aqueous solution of pH closest to 7?

Accepted Answer

A) KNO3 
B) CO2 
C) NH4I 
D) NH3 
E) CH3NH2

Question 7

What is the pH of a 0.0035 M KOH solution?

Accepted Answer

A) 2.46 
B) 5.65 
C) 8.35 
D) 11.54 
E) None of these choices is correct.

Question 8

Which of the following aqueous liquids is the most acidic?

Accepted Answer

A) 0.1 M Al(NO3)3,Ka = 1 $\times$ 10-5 
B) 0.1 M Be(NO3)2,Ka = 4 $\times$ 10-6 
C) 0.1 M Pb(NO3)2,Ka = 3 $\times$ 10-8 
D) 0.1 M Ni(NO3)2,Ka = 1 $\times$ 10-10 
E) pure water

Question 9

Ammonium chloride is used as an electrolyte in dry cells.Which of the following statements about a 0.10 M solution of NH4Cl,is correct?

Accepted Answer

A) The solution is weakly basic. 
B) The solution is strongly basic. 
C) The solution is neutral. 
D) The solution is acidic. 
E) The values for Ka and Kb for the species in solution must be known before a prediction can be made.

Question 10

Which one of the following will give a solution with a pH > 7,but is not an Arrhenius base in the strict sense?

Accepted Answer

A) CH3NH2 
B) NaOH 
C) CO2 
D) Ca(OH)2 
E) CH4

Question 11

What is the pH of a 0.0125 M NaOH solution?

Accepted Answer

A) 0.972 
B) 1.903 
C) 12.097 
D) 13.028 
E) None of these choices is correct.

Question 12

Hydroxylamine,HONH2,readily forms salts such as hydroxylamine hydrochloride which are used as antioxidants in soaps.Hydroxylamine has Kb of 9.1 $\times$ 10-9.What is the pH of a 0.025 M HONH2 solution?

Accepted Answer

A) 2.90 
B) 4.82 
C) 9.18 
D) 9.91 
E) 11.10

Question 13

What is the pH of a 0.050 M LiOH solution?

Accepted Answer

A) < 1.0 
B) 1.30 
C) 3.00 
D) 11.00 
E) 12.70

Question 14

Which one of the following pairs is not a conjugate acid-base pair?

Accepted Answer

A) H2O/OH- 
B) H2O2/HO2- 
C) OH-/O2- 
D) H2PO4-/HPO42- 
E) HCl/H+

Question 15

Lactic acid has a pKa of 3.08.What is the approximate degree of dissociation of a 0.35 M solution of lactic acid?

Accepted Answer

A) 1.1% 
B) 2.2% 
C) 4.8% 
D) 14% 
E) None of these choices is correct.

Question 16

Define an acid according to the Arrhenius theory,and write a balanced equation to support this definition.

Accepted Answer

The answer of Define an acid according to the Arrhenius...

Question 17

It is not possible to have a pH lying outside the range 0 to 14.

Accepted Answer

A) True 
 B)False

Question 18

What is the [OH-] for a solution at 25°C that has [H3O+] = 2.35 $\times$ 10-3 M?

Accepted Answer

A) 4.26 $\times$ 10-5 M 
B) 2.35 $\times$ 10-11 M 
C) 4.26 $\times$ 10-12 M 
D) 2.35 $\times$ 10-17 M 
E) None of these choices is correct.

Question 19

Which of the following is a Lewis base?

Accepted Answer

A) BCl3 
B) Cu2+ 
C) Cl- 
D) Mn2+ 
E) NH4+

Question 20

The acid dissociation constant Ka equals 1.26 $\times$ 10-2 for HSO4- and is 5.6 $\times$ 10-10 for NH4+.Which statement about the following equilibrium is correct?
HSO4-(aq)+ NH3(aq) 
SO42-(aq)+ NH4+(aq)

Accepted Answer

A) The reactants will be favored because ammonia is a stronger base than the sulfate anion. 
B) The products will be favored because the hydrogen sulfate ion is a stronger acid than the ammonium ion. 
C) Neither reactants or products will be favored because all of the species are weak acids or bases. 
D) The initial concentrations of the hydrogen sulfate ion and ammonia must be known before any prediction can be made. 
E) This reaction is impossible to predict,since the strong acid and the weak base appear on the same side of the equation.

Exam 18: Acid-Base Equilibria

The English are fond of soggy French fries ("chips")wrapped in old newspaper and generously drenched in vinegar,which is a 0.83 M solution of acetic acid.If the acetic acid in vinegar is 0.47% dissociated,calculate K_a for this acid.

The substance (CH₃CH₂) ₂NH is considered

What is the pOH of a 0.0250 M HI solution?

What is the pH of a 0.75 M HNO₃ solution?

Which of the following aqueous liquids will have the highest pH?

Which one of the following substances will give an aqueous solution of pH closest to 7?

What is the pH of a 0.0035 M KOH solution?

Which of the following aqueous liquids is the most acidic?

Ammonium chloride is used as an electrolyte in dry cells.Which of the following statements about a 0.10 M solution of NH₄Cl,is correct?

Which one of the following will give a solution with a pH > 7,but is not an Arrhenius base in the strict sense?

What is the pH of a 0.0125 M NaOH solution?

Hydroxylamine,HONH₂,readily forms salts such as hydroxylamine hydrochloride which are used as antioxidants in soaps.Hydroxylamine has K_b of 9.1 $\times$ 10^-9.What is the pH of a 0.025 M HONH₂ solution?

What is the pH of a 0.050 M LiOH solution?

Which one of the following pairs is not a conjugate acid-base pair?

Lactic acid has a pK_a of 3.08.What is the approximate degree of dissociation of a 0.35 M solution of lactic acid?

Define an acid according to the Arrhenius theory,and write a balanced equation to support this definition.

It is not possible to have a pH lying outside the range 0 to 14.

What is the [OH^-] for a solution at 25°C that has [H₃O⁺] = 2.35 $\times$ 10^-3 M?

Which of the following is a Lewis base?

Exam 18: Acid-Base Equilibria

The English are fond of soggy French fries ("chips")wrapped in old newspaper and generously drenched in vinegar,which is a 0.83 M solution of acetic acid.If the acetic acid in vinegar is 0.47% dissociated,calculate Ka for this acid.

The substance (CH3CH2) 2NH is considered

What is the pOH of a 0.0250 M HI solution?

What is the pH of a 0.75 M HNO3 solution?

Which of the following aqueous liquids will have the highest pH?

Which one of the following substances will give an aqueous solution of pH closest to 7?

What is the pH of a 0.0035 M KOH solution?

Which of the following aqueous liquids is the most acidic?

Ammonium chloride is used as an electrolyte in dry cells.Which of the following statements about a 0.10 M solution of NH4Cl,is correct?

Which one of the following will give a solution with a pH > 7,but is not an Arrhenius base in the strict sense?

What is the pH of a 0.0125 M NaOH solution?

Hydroxylamine,HONH2,readily forms salts such as hydroxylamine hydrochloride which are used as antioxidants in soaps.Hydroxylamine has Kb of 9.1 ×\times× 10-9.What is the pH of a 0.025 M HONH2 solution?

What is the pH of a 0.050 M LiOH solution?

Which one of the following pairs is not a conjugate acid-base pair?

Lactic acid has a pKa of 3.08.What is the approximate degree of dissociation of a 0.35 M solution of lactic acid?

Define an acid according to the Arrhenius theory,and write a balanced equation to support this definition.

It is not possible to have a pH lying outside the range 0 to 14.

What is the [OH-] for a solution at 25°C that has [H3O+] = 2.35 ×\times× 10-3 M?

Which of the following is a Lewis base?

The acid dissociation constant Ka equals 1.26 ×\times× 10-2 for HSO4- and is 5.6 ×\times× 10-10 for NH4+.Which statement about the following equilibrium is correct? HSO4-(aq) + NH3(aq) SO42-(aq) + NH4+(aq)

The English are fond of soggy French fries ("chips")wrapped in old newspaper and generously drenched in vinegar,which is a 0.83 M solution of acetic acid.If the acetic acid in vinegar is 0.47% dissociated,calculate K_a for this acid.

The substance (CH₃CH₂) ₂NH is considered

What is the pH of a 0.75 M HNO₃ solution?

Ammonium chloride is used as an electrolyte in dry cells.Which of the following statements about a 0.10 M solution of NH₄Cl,is correct?

Hydroxylamine,HONH₂,readily forms salts such as hydroxylamine hydrochloride which are used as antioxidants in soaps.Hydroxylamine has K_b of 9.1 $\times$ 10^-9.What is the pH of a 0.025 M HONH₂ solution?

Lactic acid has a pK_a of 3.08.What is the approximate degree of dissociation of a 0.35 M solution of lactic acid?

What is the [OH^-] for a solution at 25°C that has [H₃O⁺] = 2.35 $\times$ 10^-3 M?