Question 1

In the reaction CaO(s)  + SO2(g)   ⇋\leftrightharpoons⇋  CaSO3(s) ,

Accepted Answer

A)   O2- acts as a Lewis base, and SO2 acts as a Lewis acid.
B)   Ca2+ acts as a Lewis base, and SO42- acts as a Lewis acid.
C)   SO42- acts as a Lewis base, and SO2 acts as a Lewis acid.
D)   SO2 acts as a Lewis base, and O2- acts as a Lewis acid.
E)   SO2 acts as a Lewis base, and Ca2+ acts as a Lewis acid. F) A) and B)
G) C) and E)

Question 2

Identify the conjugate base of HCO3-.

Accepted Answer

A)   H2CO3
B)   CO32-
C)   OH-
D)   CO2
E)   COF) C) and D)
G) A) and E)

Question 3

Predict the direction in which the equilibrium will lie for the reaction H3PO4 + NO3-  ⇋\leftrightharpoons⇋  H2PO4- + HNO3. Ka(H3PO4)  = 7.5 * 10-3

Accepted Answer

A)   to the right
B)   to the left
C)   in the middle D) A) and B)
E) None of the above

Question 4

Calculate the pH of a 0.20 M solution of NH4NO3. (Kb(NH3)  = 1.8 x 10-5)

Accepted Answer

A)   0.69
B)   4.74
C)   2.72
D)   4.98
E)   9.02F) A) and B)
G) A) and E)

Question 5

Calculate the pH of a 0.011 M solution of NH4NO3. (Kb(NH3)  = 1.8 x 10-5)

Accepted Answer

A)   5.21
B)   5.41
C)   5.61
D)   5.81
E)   None of the aboveF) A) and B)
G) A) and C)

Question 6

In the reaction: 2H2O(l)   ⇋\leftrightharpoons⇋  H3O+(aq)  + OH- (aq)  the conjugate acid-base pairs are

Accepted Answer

A)   pair 1: H2O and H2O; pair 2: H3O+ and OH-
B)   pair 1: H3O+ and OH-; pair 2: H3O+ and H2O
C)   pair 1: H3O+ and OH-; pair 2: OH- and H2O
D)   pair 1: H2O and OH-; pair 2: H2O and H3O+
E)   pair 1: H3O+ and HO-: pair 2: OH- and H3O+ F) A) and B)
G) B) and D)

Question 7

What is the pH of a 0.014 M Ca(OH) 2 solution

Accepted Answer

A)   1.85
B)   1.55
C)   12.15
D)   12.45
E)   15.85F) All of the above
G) A) and B)

Question 8

What is the pH of a solution prepared by mixing 50.0 mL of 0.300 M HCl with 450.0 mL of 0.400 M HIO3? [Ka(HIO3)  = 1.6 * 10-1]

Accepted Answer

A)   1.52
B)   0.80
C)   0.72
D)   0.89
E)   0.66F) B) and E)
G) A) and B)

Question 9

The oxides CO2 and SO3 will form the following acids in water, respectively.

Accepted Answer

A)   H2CO3(aq)  and H2SO3(aq) 
B)   H2CO3(aq)  and H2SO4(aq) 
C)   H2CO2(aq)  and H2SO3(aq) 
D)   H2CO2(aq)  and H2SO4(aq) 
E)   HCOO-(aq)  and H2SO3(aq) F) B) and E)
G) A) and B)

Question 10

H3AsO3 is a stronger acid than H3AsO4.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following does not fit the definition of a Brønsted Base

Accepted Answer

A)   CO32-
B)   NH3
C)   H2O
D)   NH4+
E)   HCO3-F) A) and B)
G) B) and D)

Question 12

Calculate the pH of a 0.025 M solution of NaNO2. (Ka(HNO2)  = 4.5 x 10-4)

Accepted Answer

A)   7.27
B)   7.47
C)   7.67
D)   7.87
E)   None of the aboveF) B) and D)
G) A) and B)

Question 13

Identify the conjugate base of HPO42-.

Accepted Answer

A)   H2O
B)   H2PO4-
C)   H3PO4
D)   PO43-
E)   OH-F) B) and E)
G) None of the above

Question 14

Write the chemical formula for the acid formed when Cl2O7 is dissolved in water.

Accepted Answer

A)   HClO
B)   HClO2
C)   HClO3
D)   HClO4
E)   None of the aboveF) A) and C)
G) C) and D)

Question 15

Arrange the acids HOCl, HClO3, and HClO2 in order of increasing acid strength.

Accepted Answer

A)   HOCl 3 2
B)   HOCl 2 3
C)   HClO2 3
D)   HClO3 2
E)   HClO3 2 < HOClF) C) and D)
G) A) and E)

Question 16

Morphine, C17H19NO3, is often used to control severe post-operative pain. What is the pH of the solution made by dissolving 25.0 mg of morphine in 100. mL of water? (For morphine, Kb = 1.62 * 10-6.)

Accepted Answer

A)   9.57
B)   9.08
C)   3.79
D)   9.87
E)   4.43F) B) and D)
G) D) and E)

Question 17

A 0.1 M solution of NH4CN(aq) will be acidic.

Accepted Answer

A) True 
 B)False

Question 18

Which one of these equations represents the reaction of a weak acid with a weak base

Accepted Answer

A)  H+(aq)  + OH-(aq)   →\rarr→  H2O(aq) 
B)  H+(aq)  + CH3NH2(aq)   →\rarr→  CH3NH3+(aq) 
C)  OH-(aq)  + HCN(aq)   →\rarr→  H2O(aq)  + CN-(aq) 
D)  HCN(aq)  + CH3NH2(aq)   →\rarr→ CH3NH3+(aq)  + CN-(aq)  E) A) and C)
F) A) and B)

Question 19

Given the following Ka values, which anion is the strongest base   Acid K3H2CO34.2×10−7HCO3−4.8×10−11H2C2O46.5×10−2HC2O4−6.1×10−5H2PO4−6.2×10−8\begin{array}{|l|l|}\hline 	ext { Acid } & \mathrm{K}_{3} \\hline \mathrm{H}_{2} \mathrm{CO}_{3} & 4.2 	imes 10^{-7} \\hline \mathrm{HCO}_{3}^{-} & 4.8 	imes 10^{-11} \\hline \mathrm{H}_{2} \mathrm{C}_{2} \mathrm{O}_{4} & 6.5 	imes 10^{-2} \\hline \mathrm{HC}_{2} \mathrm{O}_{4}^{-} & 6.1 	imes 10^{-5} \\hline \mathrm{H}_{2} \mathrm{PO}_{4}^{-} & 6.2 	imes 10^{-8} \\hline\end{array} Acid H2​CO3​HCO3−​H2​C2​O4​HC2​O4−​H2​PO4−​​K3​4.2×10−74.8×10−116.5×10−26.1×10−56.2×10−8​​

Accepted Answer

A)   HCO3-
B)   CO32-
C)   HC2O4-
D)   C2O42-
E)   HPO42- F) None of the above
G) A) and B)

Question 20

Arrange the acids H2Se, H2Te, and H2S in order of increasing acid strength.

Accepted Answer

A)   H2S 2Se 2Te
B)   H2S 2Te 2Se
C)   H2Te 2S 2Se
D)   H2Se 2S 2Te
E)   H2Se 2Te 2SF) C) and D)
G) A) and B)

Exam 15: Acids and Bases

Which one of these equations represents the reaction of a weak acid with a weak base

Correct Answer
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The oxides CO₂ and SO₃ will form the following acids in water, respectively.

Correct Answer
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Morphine, C₁₇H₁₉NO₃, is often used to control severe post-operative pain. What is the pH of the solution made by dissolving 25.0 mg of morphine in 100. mL of water? (For morphine, K_b = 1.62 * 10^-6.)

Correct Answer
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Calculate the pH of a 0.025 M solution of NaNO₂. (K_a(HNO₂) = 4.5 x 10^-4)

Correct Answer
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Identify the conjugate base of HPO₄^2-.

Correct Answer
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In the reaction CaO(s) + SO₂(g) $\leftrightharpoons$ CaSO₃(s) ,

Correct Answer
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What is the pH of a 0.014 M Ca(OH) ₂ solution

Correct Answer
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Write the chemical formula for the acid formed when Cl₂O₇ is dissolved in water.

Correct Answer
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Correct Answer
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Identify the conjugate base of HCO₃^-.

Correct Answer
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What is the pH of a solution prepared by mixing 50.0 mL of 0.300 M HCl with 450.0 mL of 0.400 M HIO₃? [K_a(HIO₃) = 1.6 * 10^-1]

Correct Answer
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A 0.1 M solution of NH₄CN(aq) will be acidic.

Correct Answer
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Arrange the acids HOCl, HClO₃, and HClO₂ in order of increasing acid strength.

Correct Answer
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Calculate the pH of a 0.20 M solution of NH₄NO₃. (K_b(NH₃) = 1.8 x 10^-5)

Correct Answer
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Predict the direction in which the equilibrium will lie for the reaction H₃PO₄ + NO₃^- $\leftrightharpoons$ H₂PO₄^- + HNO₃. K_a(H₃PO₄) = 7.5 * 10^-3

Correct Answer
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In the reaction: 2H₂O(l) $\leftrightharpoons$ H₃O⁺(aq) + OH^- (aq) the conjugate acid-base pairs are

Correct Answer
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Calculate the pH of a 0.011 M solution of NH₄NO₃. (K_b(NH₃) = 1.8 x 10^-5)

Correct Answer
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Arrange the acids H₂Se, H₂Te, and H₂S in order of increasing acid strength.

Correct Answer
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H₃AsO₃ is a stronger acid than H₃AsO₄.

Correct Answer
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Which of the following does not fit the definition of a Brønsted Base

Correct Answer
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Exam 15: Acids and Bases

Which one of these equations represents the reaction of a weak acid with a weak base

Correct AnswerverifiedShow Answer

The oxides CO2 and SO3 will form the following acids in water, respectively.

Correct AnswerverifiedShow Answer

Morphine, C17H19NO3, is often used to control severe post-operative pain. What is the pH of the solution made by dissolving 25.0 mg of morphine in 100. mL of water? (For morphine, Kb = 1.62 * 10-6.)

Correct AnswerverifiedShow Answer

Calculate the pH of a 0.025 M solution of NaNO2. (Ka(HNO2) = 4.5 x 10-4)

Correct AnswerverifiedShow Answer

Identify the conjugate base of HPO42-.

Correct AnswerverifiedShow Answer

In the reaction CaO(s) + SO2(g) ⇋\leftrightharpoons⇋ CaSO3(s) ,

Correct AnswerverifiedShow Answer

What is the pH of a 0.014 M Ca(OH) 2 solution

Correct AnswerverifiedShow Answer

Write the chemical formula for the acid formed when Cl2O7 is dissolved in water.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Identify the conjugate base of HCO3-.

Correct AnswerverifiedShow Answer

What is the pH of a solution prepared by mixing 50.0 mL of 0.300 M HCl with 450.0 mL of 0.400 M HIO3? [Ka(HIO3) = 1.6 * 10-1]

Correct AnswerverifiedShow Answer

A 0.1 M solution of NH4CN(aq) will be acidic.

Correct AnswerverifiedShow Answer

Arrange the acids HOCl, HClO3, and HClO2 in order of increasing acid strength.

Correct AnswerverifiedShow Answer

Calculate the pH of a 0.20 M solution of NH4NO3. (Kb(NH3) = 1.8 x 10-5)

Correct AnswerverifiedShow Answer

Predict the direction in which the equilibrium will lie for the reaction H3PO4 + NO3- ⇋\leftrightharpoons⇋ H2PO4- + HNO3. Ka(H3PO4) = 7.5 * 10-3

Correct AnswerverifiedShow Answer

In the reaction: 2H2O(l) ⇋\leftrightharpoons⇋ H3O+(aq) + OH- (aq) the conjugate acid-base pairs are

Correct AnswerverifiedShow Answer

Calculate the pH of a 0.011 M solution of NH4NO3. (Kb(NH3) = 1.8 x 10-5)

Correct AnswerverifiedShow Answer

Arrange the acids H2Se, H2Te, and H2S in order of increasing acid strength.

Correct AnswerverifiedShow Answer

H3AsO3 is a stronger acid than H3AsO4.

Correct AnswerverifiedShow Answer

Which of the following does not fit the definition of a Brønsted Base

Correct AnswerverifiedShow Answer

Correct Answer
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The oxides CO₂ and SO₃ will form the following acids in water, respectively.

Correct Answer
verified

Morphine, C₁₇H₁₉NO₃, is often used to control severe post-operative pain. What is the pH of the solution made by dissolving 25.0 mg of morphine in 100. mL of water? (For morphine, K_b = 1.62 * 10^-6.)

Correct Answer
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Calculate the pH of a 0.025 M solution of NaNO₂. (K_a(HNO₂) = 4.5 x 10^-4)

Correct Answer
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Identify the conjugate base of HPO₄^2-.

Correct Answer
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In the reaction CaO(s) + SO₂(g) $\leftrightharpoons$ CaSO₃(s) ,

Correct Answer
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What is the pH of a 0.014 M Ca(OH) ₂ solution

Correct Answer
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Write the chemical formula for the acid formed when Cl₂O₇ is dissolved in water.

Correct Answer
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Correct Answer
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Identify the conjugate base of HCO₃^-.

Correct Answer
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What is the pH of a solution prepared by mixing 50.0 mL of 0.300 M HCl with 450.0 mL of 0.400 M HIO₃? [K_a(HIO₃) = 1.6 * 10^-1]

Correct Answer
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A 0.1 M solution of NH₄CN(aq) will be acidic.

Correct Answer
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Arrange the acids HOCl, HClO₃, and HClO₂ in order of increasing acid strength.

Correct Answer
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Calculate the pH of a 0.20 M solution of NH₄NO₃. (K_b(NH₃) = 1.8 x 10^-5)

Correct Answer
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Predict the direction in which the equilibrium will lie for the reaction H₃PO₄ + NO₃^- $\leftrightharpoons$ H₂PO₄^- + HNO₃. K_a(H₃PO₄) = 7.5 * 10^-3

Correct Answer
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In the reaction: 2H₂O(l) $\leftrightharpoons$ H₃O⁺(aq) + OH^- (aq) the conjugate acid-base pairs are

Correct Answer
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Calculate the pH of a 0.011 M solution of NH₄NO₃. (K_b(NH₃) = 1.8 x 10^-5)

Correct Answer
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Arrange the acids H₂Se, H₂Te, and H₂S in order of increasing acid strength.

Correct Answer
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H₃AsO₃ is a stronger acid than H₃AsO₄.

Correct Answer
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Correct Answer
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