Question 1

The term "strong acid" refers to any acid of 0.100 M concentration or higher.

Accepted Answer

A) True 
 B)False  False

Question 2

What is the pH of a 0.150 M NaOH solution?

Accepted Answer

A)  0.82 
B)  3.05 
C)  11.66 
D)  13.18 
A)  0.82 
B)  3.05 
C)  11.66 
D)  13.18 D

Question 3

What change in reaction direction occurs if dilute HCl is added to a H2PO4 −  solution?
H2PO4 1−  + H2O   HPO42 −  + H3O+

Accepted Answer

A)  shifts to the right 
B)  shifts to the left 
C)  no change in the reaction 
D)  there is insufficient information to solve this problem 
A)  shifts to the right 
B)  shifts to the left 
C)  no change in the reaction 
D)  there is insufficient information to solve this problem B

Question 4

If a reaction is in a state where Q > K,

Accepted Answer

A)  the rate of the reaction will always double. 
B)  more products will form. 
C)  more reactants will form. 
D)  the reaction will remain in a steady-state. 
A)  the rate of the reaction will always double. 
B)  more products will form. 
C)  more reactants will form. 
D)  the reaction will remain in a steady-state.

Question 5

Which of the following is a weak acid?

Accepted Answer

A)  NH3 
B)  HClO 
C)  HCl 
D)  HNO3 
A)  NH3 
B)  HClO 
C)  HCl 
D)  HNO3

Question 6

According to the Brønsted-Lowry theory of acids and bases, acids are proton (hydronium) acceptors.

Accepted Answer

A) True 
 B)False

Question 7

The synthesis of the pesticide thionyl chloride (OSCl2) proceeds according to:
SO3( g ) + SCl2( l )   OSCl2( l ) + SO2( g ) 
If Δ G0 = − 106 kJ/mol for this reaction at 298K, what is the Keq at this temperature? Recall: R = 8.314 J mol − 1 K − 1.

Accepted Answer

A)  7.21 × 1012 
B)  3.50 × 1014 
C)  3.81 × 1018 
D)  1.19 × 1020 
A)  7.21 × 1012 
B)  3.50 × 1014 
C)  3.81 × 1018 
D)  1.19 × 1020

Question 8

Consider the weak base ClO − .
ClO −  + H2O   HClO + OH − 
If a dilute HCl is slowly titrated into a sample of ClO − , the [ClO − ] concentration:

Accepted Answer

A)  decreases 
B)  remains constant 
C)  increases 
D)  there is insufficient information to solve this problem 
A)  decreases 
B)  remains constant 
C)  increases 
D)  there is insufficient information to solve this problem

Question 9

A catalyst will increase the rate of the forward and reverse reactions equally.

Accepted Answer

A) True 
 B)False

Question 10

A large "K" value (>0) indicates that the reaction tends to favor the forward direction and the formation of products.

Accepted Answer

A) True 
 B)False

Question 11

If NaCl is added to a saturated solution of AgCl, the equilibrium will shift back towards the reactants; and the solubility of AgCl will decrease.

Accepted Answer

A) True 
 B)False

Question 12

The conjugate acid of sodium acetate (Na+CH3COO − ) is:

Accepted Answer

A)  NaOH 
B)  CH3COOH 
C)  HCl 
D)  K+CH3COO −  
A)  NaOH 
B)  CH3COOH 
C)  HCl 
D)  K+CH3COO −

Question 13

At equilibrium Δ G is:

Accepted Answer

A)  = 0 
B)  > 0 
C)  can not be determined 
A)  = 0 
B)  > 0 
C)  can not be determined

Question 14

What is the pH of a 0.1055 M CH3COOH solution (Ka = 1.75 × 10 − 5)?

Accepted Answer

A)  2.770 
B)  2.867 
C)  3.188 
D)  8.474 
A)  2.770 
B)  2.867 
C)  3.188 
D)  8.474

Question 15

Exothermic reactions in equilibrium will favor the reactants if the system is cooled.

Accepted Answer

A) True 
 B)False

Question 16

Which of following species is amphoteric?

Accepted Answer

A)  NaOH 
B)  C4H10 
C)  H2O 
D)  H2SO4 
A)  NaOH 
B)  C4H10 
C)  H2O 
D)  H2SO4

Question 17

Which "K" value indicates a reaction most favoring the formation of products?

Accepted Answer

A)  K = 5.31 × 103 
B)  K = 4.99 × 106 
C)  K = 8.2 × 10 − 3 
D)  K = 1.7 × 10 − 6 
A)  K = 5.31 × 103 
B)  K = 4.99 × 106 
C)  K = 8.2 × 10 − 3 
D)  K = 1.7 × 10 − 6

Question 18

Cememt structures with many small cracks are more likely to fail than similar structure with fewer, larger cracks.

Accepted Answer

A) True 
 B)False

Question 19

The lower the pH of a weak acid, the:

Accepted Answer

A)  higher the concentration of the weak acid. 
B)  higher the dissolved H2(g) concentration. 
C)  higher the Ka of the acid. 
D)  none of the above 
A)  higher the concentration of the weak acid. 
B)  higher the dissolved H2(g) concentration. 
C)  higher the Ka of the acid. 
D)  none of the above

Question 20

Which of the following is a strong base?

Accepted Answer

A)  HClO4 
B)  HNO2 
C)  HCl 
D)  KOH 
A)  HClO4 
B)  HNO2 
C)  HCl 
D)  KOH

The term "strong acid" refers to any acid of 0.100 M concentration or higher.

What is the pH of a 0.150 M NaOH solution?

What change in reaction direction occurs if dilute HCl is added to a H₂PO₄⁻ solution? H₂PO₄¹⁻ + H₂O HPO₄^{2 −} + H₃O⁺

If a reaction is in a state where Q > K,

Which of the following is a weak acid?

According to the Brønsted-Lowry theory of acids and bases, acids are proton (hydronium) acceptors.

The synthesis of the pesticide thionyl chloride (OSCl₂) proceeds according to: SO₃( g ) + SCl₂( l ) OSCl₂( l ) + SO₂( g ) If Δ G⁰ = − 106 kJ/mol for this reaction at 298K, what is the K_eq at this temperature? Recall: R = 8.314 J mol^{− 1} K^{− 1}.

Consider the weak base ClO⁻. ClO⁻ + H₂O HClO + OH⁻ If a dilute HCl is slowly titrated into a sample of ClO⁻, the [ClO⁻] concentration:

A catalyst will increase the rate of the forward and reverse reactions equally.

A large "K" value (>0) indicates that the reaction tends to favor the forward direction and the formation of products.

If NaCl is added to a saturated solution of AgCl, the equilibrium will shift back towards the reactants; and the solubility of AgCl will decrease.

The conjugate acid of sodium acetate (Na⁺CH₃COO⁻) is:

At equilibrium Δ G is:

What is the pH of a 0.1055 M CH₃COOH solution (K_a = 1.75 × 10^{− 5})?

Exothermic reactions in equilibrium will favor the reactants if the system is cooled.

Which of following species is amphoteric?

Which "K" value indicates a reaction most favoring the formation of products?

Cememt structures with many small cracks are more likely to fail than similar structure with fewer, larger cracks.

The lower the pH of a weak acid, the:

Which of the following is a strong base?

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Exam 12: Chemical Equilibrium

The term "strong acid" refers to any acid of 0.100 M concentration or higher.

What is the pH of a 0.150 M NaOH solution?

What change in reaction direction occurs if dilute HCl is added to a H2PO4 − solution? H2PO4 1− + H2O HPO42 − + H3O+

If a reaction is in a state where Q > K,

Which of the following is a weak acid?

According to the Brønsted-Lowry theory of acids and bases, acids are proton (hydronium) acceptors.

The synthesis of the pesticide thionyl chloride (OSCl2) proceeds according to: SO3( g ) + SCl2( l ) OSCl2( l ) + SO2( g ) If Δ G0 = − 106 kJ/mol for this reaction at 298K, what is the Keq at this temperature? Recall: R = 8.314 J mol − 1 K − 1.

Consider the weak base ClO − . ClO − + H2O HClO + OH − If a dilute HCl is slowly titrated into a sample of ClO − , the [ClO − ] concentration:

A catalyst will increase the rate of the forward and reverse reactions equally.

A large "K" value (>0) indicates that the reaction tends to favor the forward direction and the formation of products.

If NaCl is added to a saturated solution of AgCl, the equilibrium will shift back towards the reactants; and the solubility of AgCl will decrease.

The conjugate acid of sodium acetate (Na+CH3COO − ) is:

At equilibrium Δ G is:

What is the pH of a 0.1055 M CH3COOH solution (Ka = 1.75 × 10 − 5)?

Exothermic reactions in equilibrium will favor the reactants if the system is cooled.

Which of following species is amphoteric?

Which "K" value indicates a reaction most favoring the formation of products?

Cememt structures with many small cracks are more likely to fail than similar structure with fewer, larger cracks.

The lower the pH of a weak acid, the:

Which of the following is a strong base?

Introduction to Chemistry

Atoms and Molecules

Molecules Moles Chemical Equations

Stoichiometry

Gases

The Periodic Table and Atomic Structure

Chemical Bonding and Molecular Structure

Molecules and Materials

Energy and Chemistry

Entropy and the Second Law of Thermodynamics

Chemical Kinetics

Electrochemistry

Filters

What change in reaction direction occurs if dilute HCl is added to a H₂PO₄⁻ solution? H₂PO₄¹⁻ + H₂O HPO₄^{2 −} + H₃O⁺

The synthesis of the pesticide thionyl chloride (OSCl₂) proceeds according to: SO₃( g ) + SCl₂( l ) OSCl₂( l ) + SO₂( g ) If Δ G⁰ = − 106 kJ/mol for this reaction at 298K, what is the K_eq at this temperature? Recall: R = 8.314 J mol^{− 1} K^{− 1}.

Consider the weak base ClO⁻. ClO⁻ + H₂O HClO + OH⁻ If a dilute HCl is slowly titrated into a sample of ClO⁻, the [ClO⁻] concentration:

The conjugate acid of sodium acetate (Na⁺CH₃COO⁻) is:

What is the pH of a 0.1055 M CH₃COOH solution (K_a = 1.75 × 10^{− 5})?