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The Ka of some acid,HA,at 25.0 °C is 4.9 × The K<sub>a</sub> of some acid,HA,at 25.0 °C is 4.9 × .What is the pH of a 0.050 M aqueous solution of A<sup>-</sup>? A) 1.0 × 10<sup>-3</sup> B) 3.00 C) 11.00 D) 9.9 × 10<sup>-12</sup> E) 2.5 × 10<sup>-11</sup> .What is the pH of a 0.050 M aqueous solution of A-?


A) 1.0 × 10-3
B) 3.00
C) 11.00
D) 9.9 × 10-12
E) 2.5 × 10-11

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Using the data in the table,which of the conjugate acids below is the strongest acid? Using the data in the table,which of the conjugate acids below is the strongest acid? A) HClO B) HCO<sub>3</sub><sup>-</sup> C) H<sub>2</sub>S D) NH<sub>3</sub>CH<sub>3</sub><sup>+</sup> E) H<sub>2</sub>S and HClO


A) HClO
B) HCO3-
C) H2S
D) NH3CH3+
E) H2S and HClO

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Using the data in the table,which of the conjugate acids below is the weakest acid? Using the data in the table,which of the conjugate acids below is the weakest acid? A) NH<sub>4</sub><sup>+</sup> B) C<sub>5</sub>H<sub>5</sub>NH<sup>+</sup> C) NH<sub>3</sub>CH<sub>2</sub>CH<sub>3</sub><sup>+</sup> D) H<sub>3</sub>NOH<sup>+</sup> E) NH<sub>4</sub><sup>+</sup> and NH<sub>3</sub>CH<sub>3</sub><sup>+</sup>


A) NH4+
B) C5H5NH+
C) NH3CH2CH3+
D) H3NOH+
E) NH4+ and NH3CH3+

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What is the concentration (in M) of hydroxide ions in a solution at 25.0 °C with pH = 4.282?


A) 4.28
B) 9.72
C) 1.92 × What is the concentration (in M) of hydroxide ions in a solution at 25.0 °C with pH = 4.282? A) 4.28 B) 9.72 C) 1.92 × D) 5.22 × E) none of the above
D) 5.22 × What is the concentration (in M) of hydroxide ions in a solution at 25.0 °C with pH = 4.282? A) 4.28 B) 9.72 C) 1.92 × D) 5.22 × E) none of the above
E) none of the above

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An aqueous solution contains 0.500 M NaOH at 25.0 °C.The pH of the solution is ________.


A) 0.500
B) 13.70
C) 0.301
D) 7.00
E) 13.50

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In which of the following aqueous solutions does the weak acid exhibit the highest percentage ionization?


A) 0.01 M H2SO3 ( In which of the following aqueous solutions does the weak acid exhibit the highest percentage ionization? A) 0.01 M H<sub>2</sub>SO<sub>3</sub> ( = 1.4 × ) B) 0.01 M HCN ( = 6.2 × ) C) 0.01 M H<sub>2</sub>CO<sub>3</sub> ( = 4.5 × ) D) 0.01 M HC<sub>3</sub>H<sub>5</sub>O<sub>2</sub> ( = 1.3 × ) E) 0.01 M HOCl ( = 3.5 × ) = 1.4 × In which of the following aqueous solutions does the weak acid exhibit the highest percentage ionization? A) 0.01 M H<sub>2</sub>SO<sub>3</sub> ( = 1.4 × ) B) 0.01 M HCN ( = 6.2 × ) C) 0.01 M H<sub>2</sub>CO<sub>3</sub> ( = 4.5 × ) D) 0.01 M HC<sub>3</sub>H<sub>5</sub>O<sub>2</sub> ( = 1.3 × ) E) 0.01 M HOCl ( = 3.5 × ) )
B) 0.01 M HCN ( In which of the following aqueous solutions does the weak acid exhibit the highest percentage ionization? A) 0.01 M H<sub>2</sub>SO<sub>3</sub> ( = 1.4 × ) B) 0.01 M HCN ( = 6.2 × ) C) 0.01 M H<sub>2</sub>CO<sub>3</sub> ( = 4.5 × ) D) 0.01 M HC<sub>3</sub>H<sub>5</sub>O<sub>2</sub> ( = 1.3 × ) E) 0.01 M HOCl ( = 3.5 × ) = 6.2 × In which of the following aqueous solutions does the weak acid exhibit the highest percentage ionization? A) 0.01 M H<sub>2</sub>SO<sub>3</sub> ( = 1.4 × ) B) 0.01 M HCN ( = 6.2 × ) C) 0.01 M H<sub>2</sub>CO<sub>3</sub> ( = 4.5 × ) D) 0.01 M HC<sub>3</sub>H<sub>5</sub>O<sub>2</sub> ( = 1.3 × ) E) 0.01 M HOCl ( = 3.5 × ) )
C) 0.01 M H2CO3 ( In which of the following aqueous solutions does the weak acid exhibit the highest percentage ionization? A) 0.01 M H<sub>2</sub>SO<sub>3</sub> ( = 1.4 × ) B) 0.01 M HCN ( = 6.2 × ) C) 0.01 M H<sub>2</sub>CO<sub>3</sub> ( = 4.5 × ) D) 0.01 M HC<sub>3</sub>H<sub>5</sub>O<sub>2</sub> ( = 1.3 × ) E) 0.01 M HOCl ( = 3.5 × ) = 4.5 × In which of the following aqueous solutions does the weak acid exhibit the highest percentage ionization? A) 0.01 M H<sub>2</sub>SO<sub>3</sub> ( = 1.4 × ) B) 0.01 M HCN ( = 6.2 × ) C) 0.01 M H<sub>2</sub>CO<sub>3</sub> ( = 4.5 × ) D) 0.01 M HC<sub>3</sub>H<sub>5</sub>O<sub>2</sub> ( = 1.3 × ) E) 0.01 M HOCl ( = 3.5 × ) )
D) 0.01 M HC3H5O2 ( In which of the following aqueous solutions does the weak acid exhibit the highest percentage ionization? A) 0.01 M H<sub>2</sub>SO<sub>3</sub> ( = 1.4 × ) B) 0.01 M HCN ( = 6.2 × ) C) 0.01 M H<sub>2</sub>CO<sub>3</sub> ( = 4.5 × ) D) 0.01 M HC<sub>3</sub>H<sub>5</sub>O<sub>2</sub> ( = 1.3 × ) E) 0.01 M HOCl ( = 3.5 × ) = 1.3 × In which of the following aqueous solutions does the weak acid exhibit the highest percentage ionization? A) 0.01 M H<sub>2</sub>SO<sub>3</sub> ( = 1.4 × ) B) 0.01 M HCN ( = 6.2 × ) C) 0.01 M H<sub>2</sub>CO<sub>3</sub> ( = 4.5 × ) D) 0.01 M HC<sub>3</sub>H<sub>5</sub>O<sub>2</sub> ( = 1.3 × ) E) 0.01 M HOCl ( = 3.5 × ) )
E) 0.01 M HOCl ( In which of the following aqueous solutions does the weak acid exhibit the highest percentage ionization? A) 0.01 M H<sub>2</sub>SO<sub>3</sub> ( = 1.4 × ) B) 0.01 M HCN ( = 6.2 × ) C) 0.01 M H<sub>2</sub>CO<sub>3</sub> ( = 4.5 × ) D) 0.01 M HC<sub>3</sub>H<sub>5</sub>O<sub>2</sub> ( = 1.3 × ) E) 0.01 M HOCl ( = 3.5 × ) = 3.5 × In which of the following aqueous solutions does the weak acid exhibit the highest percentage ionization? A) 0.01 M H<sub>2</sub>SO<sub>3</sub> ( = 1.4 × ) B) 0.01 M HCN ( = 6.2 × ) C) 0.01 M H<sub>2</sub>CO<sub>3</sub> ( = 4.5 × ) D) 0.01 M HC<sub>3</sub>H<sub>5</sub>O<sub>2</sub> ( = 1.3 × ) E) 0.01 M HOCl ( = 3.5 × ) )

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The magnitude of Kw indicates that ________.


A) water autoionizes very slowly
B) water autoionizes very quickly
C) water autoionizes only to a very small extent
D) the autoionization of water is exothermic

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C

What is the pOH of 0.606 M anilinium hydrochloride ( What is the pOH of 0.606 M anilinium hydrochloride ( N Cl) solution in water,given that for aniline is 3.83 × ? A) 12.42 B) 1.82 C) 8.60 D) 5.40 E) 12.18 What is the pOH of 0.606 M anilinium hydrochloride ( N Cl) solution in water,given that for aniline is 3.83 × ? A) 12.42 B) 1.82 C) 8.60 D) 5.40 E) 12.18 N What is the pOH of 0.606 M anilinium hydrochloride ( N Cl) solution in water,given that for aniline is 3.83 × ? A) 12.42 B) 1.82 C) 8.60 D) 5.40 E) 12.18 Cl) solution in water,given that What is the pOH of 0.606 M anilinium hydrochloride ( N Cl) solution in water,given that for aniline is 3.83 × ? A) 12.42 B) 1.82 C) 8.60 D) 5.40 E) 12.18 for aniline is 3.83 × What is the pOH of 0.606 M anilinium hydrochloride ( N Cl) solution in water,given that for aniline is 3.83 × ? A) 12.42 B) 1.82 C) 8.60 D) 5.40 E) 12.18 ?


A) 12.42
B) 1.82
C) 8.60
D) 5.40
E) 12.18

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An aqueous solution of a particular compound has pH = 7.46.The compound is ________.


A) a weak base
B) a weak acid
C) a strong acid
D) a strong base
E) a salt

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What is the pH of 0.626 M anilinium hydrochloride ( What is the pH of 0.626 M anilinium hydrochloride ( N Cl) solution in water,given that for aniline is 3.83 × ? A) 1.81 B) 5.39 C) 12.19 D) 12.42 E) 8.61 What is the pH of 0.626 M anilinium hydrochloride ( N Cl) solution in water,given that for aniline is 3.83 × ? A) 1.81 B) 5.39 C) 12.19 D) 12.42 E) 8.61 N What is the pH of 0.626 M anilinium hydrochloride ( N Cl) solution in water,given that for aniline is 3.83 × ? A) 1.81 B) 5.39 C) 12.19 D) 12.42 E) 8.61 Cl) solution in water,given that What is the pH of 0.626 M anilinium hydrochloride ( N Cl) solution in water,given that for aniline is 3.83 × ? A) 1.81 B) 5.39 C) 12.19 D) 12.42 E) 8.61 for aniline is 3.83 × What is the pH of 0.626 M anilinium hydrochloride ( N Cl) solution in water,given that for aniline is 3.83 × ? A) 1.81 B) 5.39 C) 12.19 D) 12.42 E) 8.61 ?


A) 1.81
B) 5.39
C) 12.19
D) 12.42
E) 8.61

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B

The molar concentration of hydroxide ion in pure water at 25 °C is ________.


A) 1.00
B) 0.00
C) 1.0 × 10-14
D) 1.0 × 10-7
E) 7.00

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Calculate the concentration (in M) of hydroxide ions in a solution at 25.0 °C with a pOH of 3.58.


A) 2.63 × 1010
B) 3.80 × 10-11
C) 1.00 × 10-7
D) 3.80 × 103
E) 2.63 × 10-4

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What is the conjugate acid of OH-?


A) O2
B) H2O
C) O-
D) O2-
E) H3O+

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The conjugate base of HSO4- is ________.


A) H2SO4
B) HSO4+
C) H+
D) SO42-
E) HSO3+

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D

What is the pH of an aqueous solution at 25.0 °C in which [O What is the pH of an aqueous solution at 25.0 °C in which [O ] is 0.0030 M? A) 5.81 B) -11.48 C) 2.52 D) -2.52 E) 11.48 ] is 0.0030 M?


A) 5.81
B) -11.48
C) 2.52
D) -2.52
E) 11.48

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HA is a weak acid.Which equilibrium corresponds to the equilibrium constant Kb for A-?


A) HA (aq) + H2O (l) HA is a weak acid.Which equilibrium corresponds to the equilibrium constant K<sub>b</sub> for A<sup>-</sup>? A) HA (aq) + H<sub>2</sub>O (l) H<sub>2</sub>A<sup>+</sup> (aq) + OH<sup>-</sup>(aq) B) A<sup>-</sup> (aq) + H<sub>3</sub>O<sup>+</sup> (aq) HA (aq) + H<sub>2</sub>O (l) C) HA (aq) + OH<sup>-</sup> (aq) H<sub>2</sub>O (l) + H<sup>+</sup> (aq) D) A<sup>-</sup> (aq) + H<sub>2</sub>O (l) HA (aq) + OH<sup>-</sup> (aq) E) A<sup>-</sup> (aq) + OH<sup>-</sup> (aq) HOA<sup>2-</sup> (aq) H2A+ (aq) + OH-(aq)
B) A- (aq) + H3O+ (aq) HA is a weak acid.Which equilibrium corresponds to the equilibrium constant K<sub>b</sub> for A<sup>-</sup>? A) HA (aq) + H<sub>2</sub>O (l) H<sub>2</sub>A<sup>+</sup> (aq) + OH<sup>-</sup>(aq) B) A<sup>-</sup> (aq) + H<sub>3</sub>O<sup>+</sup> (aq) HA (aq) + H<sub>2</sub>O (l) C) HA (aq) + OH<sup>-</sup> (aq) H<sub>2</sub>O (l) + H<sup>+</sup> (aq) D) A<sup>-</sup> (aq) + H<sub>2</sub>O (l) HA (aq) + OH<sup>-</sup> (aq) E) A<sup>-</sup> (aq) + OH<sup>-</sup> (aq) HOA<sup>2-</sup> (aq) HA (aq) + H2O (l)
C) HA (aq) + OH- (aq) HA is a weak acid.Which equilibrium corresponds to the equilibrium constant K<sub>b</sub> for A<sup>-</sup>? A) HA (aq) + H<sub>2</sub>O (l) H<sub>2</sub>A<sup>+</sup> (aq) + OH<sup>-</sup>(aq) B) A<sup>-</sup> (aq) + H<sub>3</sub>O<sup>+</sup> (aq) HA (aq) + H<sub>2</sub>O (l) C) HA (aq) + OH<sup>-</sup> (aq) H<sub>2</sub>O (l) + H<sup>+</sup> (aq) D) A<sup>-</sup> (aq) + H<sub>2</sub>O (l) HA (aq) + OH<sup>-</sup> (aq) E) A<sup>-</sup> (aq) + OH<sup>-</sup> (aq) HOA<sup>2-</sup> (aq) H2O (l) + H+ (aq)
D) A- (aq) + H2O (l) HA is a weak acid.Which equilibrium corresponds to the equilibrium constant K<sub>b</sub> for A<sup>-</sup>? A) HA (aq) + H<sub>2</sub>O (l) H<sub>2</sub>A<sup>+</sup> (aq) + OH<sup>-</sup>(aq) B) A<sup>-</sup> (aq) + H<sub>3</sub>O<sup>+</sup> (aq) HA (aq) + H<sub>2</sub>O (l) C) HA (aq) + OH<sup>-</sup> (aq) H<sub>2</sub>O (l) + H<sup>+</sup> (aq) D) A<sup>-</sup> (aq) + H<sub>2</sub>O (l) HA (aq) + OH<sup>-</sup> (aq) E) A<sup>-</sup> (aq) + OH<sup>-</sup> (aq) HOA<sup>2-</sup> (aq) HA (aq) + OH- (aq)
E) A- (aq) + OH- (aq) HA is a weak acid.Which equilibrium corresponds to the equilibrium constant K<sub>b</sub> for A<sup>-</sup>? A) HA (aq) + H<sub>2</sub>O (l) H<sub>2</sub>A<sup>+</sup> (aq) + OH<sup>-</sup>(aq) B) A<sup>-</sup> (aq) + H<sub>3</sub>O<sup>+</sup> (aq) HA (aq) + H<sub>2</sub>O (l) C) HA (aq) + OH<sup>-</sup> (aq) H<sub>2</sub>O (l) + H<sup>+</sup> (aq) D) A<sup>-</sup> (aq) + H<sub>2</sub>O (l) HA (aq) + OH<sup>-</sup> (aq) E) A<sup>-</sup> (aq) + OH<sup>-</sup> (aq) HOA<sup>2-</sup> (aq) HOA2- (aq)

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The The for formic acid (HCO<sub>2</sub>H) is 1.8 × .What is the pH of a 0.20 M aqueous solution of sodium formate (NaHC ) ? A) 11.64 B) 5.48 C) 3.39 D) 8.52 E) 4.26 for formic acid (HCO2H) is 1.8 × The for formic acid (HCO<sub>2</sub>H) is 1.8 × .What is the pH of a 0.20 M aqueous solution of sodium formate (NaHC ) ? A) 11.64 B) 5.48 C) 3.39 D) 8.52 E) 4.26 .What is the pH of a 0.20 M aqueous solution of sodium formate (NaHC The for formic acid (HCO<sub>2</sub>H) is 1.8 × .What is the pH of a 0.20 M aqueous solution of sodium formate (NaHC ) ? A) 11.64 B) 5.48 C) 3.39 D) 8.52 E) 4.26 ) ?


A) 11.64
B) 5.48
C) 3.39
D) 8.52
E) 4.26

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The pH of a 0.55 M aqueous solution of hypobromous acid,HBrO,at 25.0 °C is 4.48.What is the value of Ka for HBrO?


A) 2.0 × 10-9
B) 1.1 × 10-9
C) 6.0 × 10-5
D) 3.3 × 10-5
E) 3.0 × 104

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


A) (CH3) 3NH+
B) CH3COOH
C) HF
D) HNO2
E) all of the above

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The base-dissociation constant,Kb,for an unknown base is The base-dissociation constant,K<sub>b</sub>,for an unknown base is The acid-dissociation constant,K<sub>a</sub>,for the conjugate ion is ________. A) 1.0 × 10<sup>-7</sup> B) 7.1 × 10<sup>-6</sup> C) 1.4 × 10<sup>-23</sup> D) 1.4 × 10<sup>-5</sup> E) 7.1 × 10<sup>-4</sup> The acid-dissociation constant,Ka,for the conjugate ion is ________.


A) 1.0 × 10-7
B) 7.1 × 10-6
C) 1.4 × 10-23
D) 1.4 × 10-5
E) 7.1 × 10-4

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