Question 1

Increasing the pressure will ________. 2H₂S (g) + 3O₂ (g)   2SO₂ (g) + 2H₂O (g)

Accepted Answer

A)  shift the reaction to the right 
B)  shift the reaction to the left 
C)  have no effect 
D)  cannot be determined, since the temperature is unknown 
A)  shift the reaction to the right 
B)  shift the reaction to the left 
C)  have no effect 
D)  cannot be determined, since the temperature is unknown

Question 2

Which statement is true about equilibrium?

Accepted Answer

A)  The forward reaction rate is greater than the reverse reaction rate. 
B)  The reverse reaction rate is greater than the forward reaction rate. 
C)  The forward reaction rate is equal to the reverse reaction rate. 
D)  Either A or B depending on the reaction. 
A)  The forward reaction rate is greater than the reverse reaction rate. 
B)  The reverse reaction rate is greater than the forward reaction rate. 
C)  The forward reaction rate is equal to the reverse reaction rate. 
D)  Either A or B depending on the reaction.

Question 3

Adding H₂O to the reaction vessel will ________. 2H₂S (g) + 3O₂ (g)   2SO₂ (g) + 2H₂O (g)

Accepted Answer

A)  shift the reaction to the right 
B)  shift the reaction to the left 
C)  have no effect 
D)  cannot be determined, since the temperature is unknown 
A)  shift the reaction to the right 
B)  shift the reaction to the left 
C)  have no effect 
D)  cannot be determined, since the temperature is unknown

Question 4

Decreasing the pressure will ________. 2SO₃ (g) + 2CL₂ (g)   2SO₂CL₂ (g) + O₂ (g)

Accepted Answer

A)  shift the reaction to the right 
B)  shift the reaction to the left 
C)  have no effect 
D)  cannot be determined, since the temperature is unknown 
A)  shift the reaction to the right 
B)  shift the reaction to the left 
C)  have no effect 
D)  cannot be determined, since the temperature is unknown

Question 5

Match each reaction and its equilibrium concentrations with its corresponding equilibrium constant value.
-2 NH? (g)   N? (g) + 3H? (g)
[H?] = 0.420 M, [N?] = 0.600 M, [NH?] = 0.060 M

Accepted Answer

A) 25 
B) 12.3 
C) 5.0 
A) 25 
B) 12.3 
C) 5.0

Question 6

A reaction is approaching equilibrium when the rate of a forward reaction slows down and the rate of a reverse reaction speeds up.

Accepted Answer

A) True 
 B)False

Question 7

A reaction that favors products has a Keq > 1.

Accepted Answer

A) True 
 B)False

Question 8

Adding KSCN will ________. FeCL₃ (aq) + KSCN (aq)   K3[Fe(SCN)6] (aq) + 3KCl (aq)
Yellow colorless red colorless

Accepted Answer

A)  turn the solution more red. 
B)  turn the solution less red. 
C)  turn the solution clear. 
D)  have no effect on the color. 
A)  turn the solution more red. 
B)  turn the solution less red. 
C)  turn the solution clear. 
D)  have no effect on the color.

Question 9

If more reactants are added to a chemical reaction already at equilibrium, a shift to the products is required to restore an equilibrium condition.

Accepted Answer

A) True 
 B)False

Question 10

Identify each of the equilibrium constant values  as "Equilibrium lies to the right/products favored" or "Equilibrium lies to the left/reactants favored."
-2.3 × 103

Accepted Answer

A) Equilibrium lies to the right/ products favored 
B) Equilibrium lies to the left/reactants favored 
A) Equilibrium lies to the right/ products favored 
B) Equilibrium lies to the left/reactants favored

Question 11

Increasing the volume will ________. 2NH₃ (g)   N₂ (g) + 3H₂ (g)

Accepted Answer

A)  shift the reaction to the right 
B)  shift the reaction to the left 
C)  have no effect 
D)  cannot be determined, since the temperature is unknown 
A)  shift the reaction to the right 
B)  shift the reaction to the left 
C)  have no effect 
D)  cannot be determined, since the temperature is unknown

Question 12

A reaction is close to equilibrium when a rapid reverse reaction slows down and a slower forward reaction speeds up.

Accepted Answer

A) True 
 B)False

Question 13

If the solubility product of tin(II) carbonate is 1.03 × 10-9, the molar solubility is 3.21 × 10-5 M.

Accepted Answer

A) True 
 B)False

Question 14

When a reaction shows one arrow pointing from left to right, this means ________.

Accepted Answer

A)  the reaction has reached equilibrium 
B)  the reaction favors the right direction 
C)  there is practically no reactant left 
D)  both B and C 
A)  the reaction has reached equilibrium 
B)  the reaction favors the right direction 
C)  there is practically no reactant left 
D)  both B and C

Question 15

Identify each of the equilibrium constant values  as "Equilibrium lies to the right/products favored" or "Equilibrium lies to the left/reactants favored."
-3.1 × 10-8

Accepted Answer

A) Equilibrium lies to the right/ products favored 
B) Equilibrium lies to the left/reactants favored 
A) Equilibrium lies to the right/ products favored 
B) Equilibrium lies to the left/reactants favored

Question 16

The equilibrium constant expression for the reaction is ________. 2SO₃ (g) + 2CL₂ (g)   2SO₂CL₂ (g) + O₂ (g)

Accepted Answer

A)  Keq = [SO₂CL₂] [O₂] / [SO₃] [CL₂] 
B)  Keq = [SO₃] [CL₂] / [SO₂CL₂] [O₂] 
C)  Keq = [SO₂CL₂]2[O₂] / [SO₃]2[CL₂]2 
D)  Keq = [SO₃]2[CL₂]2 / [SO₂CL₂]2[O₂] 
A)  Keq = [SO₂CL₂] [O₂] / [SO₃] [CL₂] 
B)  Keq = [SO₃] [CL₂] / [SO₂CL₂] [O₂] 
C)  Keq = [SO₂CL₂]2[O₂] / [SO₃]2[CL₂]2 
D)  Keq = [SO₃]2[CL₂]2 / [SO₂CL₂]2[O₂]

Question 17

If the solubility of a certain salt A2B is 1.4 × 10-4 M, the value of the solubility product will be ________.

Accepted Answer

A)  2.7 × 10-12 
B)  1.1 × 10-11 
C)  1.6 × 10-11 
D)  3.6 × 10-12 
A)  2.7 × 10-12 
B)  1.1 × 10-11 
C)  1.6 × 10-11 
D)  3.6 × 10-12

Question 18

Consider the reaction: C (s) + CO? (g)   2 CO (g) (endothermic). 
Match each equilibrium change with its corresponding consequence.
-expanding the reaction vessel

Accepted Answer

A) Equilibrium is shifted to the right. 
B) No effect on the equilibrium. 
C) Equilibrium is shifted to the left. 
A) Equilibrium is shifted to the right. 
B) No effect on the equilibrium. 
C) Equilibrium is shifted to the left.

Question 19

Increasing the concentration of hydrogen gas will ________. O₂ (g) + 2H₂ (g)   2H₂O (g)

Accepted Answer

A)  shift the reaction to the right 
B)  shift the reaction to the left 
C)  have no effect 
D)  cannot be determined, since the temperature is unknown 
A)  shift the reaction to the right 
B)  shift the reaction to the left 
C)  have no effect 
D)  cannot be determined, since the temperature is unknown

Question 20

Consider the reaction: C (s) + CO? (g)   2 CO (g) (endothermic). 
Match each equilibrium change with its corresponding consequence.
-adding heat

Accepted Answer

A) Equilibrium is shifted to the right. 
B) No effect on the equilibrium. 
C) Equilibrium is shifted to the left. 
A) Equilibrium is shifted to the right. 
B) No effect on the equilibrium. 
C) Equilibrium is shifted to the left.

Increasing the pressure will ________. 2H₂S (g) + 3O₂ (g) 2SO₂ (g) + 2H₂O (g)

Which statement is true about equilibrium?

Adding H₂O to the reaction vessel will ________. 2H₂S (g) + 3O₂ (g) 2SO₂ (g) + 2H₂O (g)

Decreasing the pressure will ________. 2SO₃ (g) + 2CL₂ (g) 2SO₂CL₂ (g) + O₂ (g)

Match each reaction and its equilibrium concentrations with its corresponding equilibrium constant value. -2 NH? (g) N? (g) + 3H? (g) [H?] = 0.420 M, [N?] = 0.600 M, [NH?] = 0.060 M

A reaction is approaching equilibrium when the rate of a forward reaction slows down and the rate of a reverse reaction speeds up.

A reaction that favors products has a Keq > 1.

Adding KSCN will ________. FeCL₃ (aq) + KSCN (aq) K3[Fe(SCN)6] (aq) + 3KCl (aq) Yellow colorless red colorless

If more reactants are added to a chemical reaction already at equilibrium, a shift to the products is required to restore an equilibrium condition.

Identify each of the equilibrium constant values as "Equilibrium lies to the right/products favored" or "Equilibrium lies to the left/reactants favored." -2.3 × 10³

Increasing the volume will ________. 2NH₃ (g) N₂ (g) + 3H₂ (g)

A reaction is close to equilibrium when a rapid reverse reaction slows down and a slower forward reaction speeds up.

If the solubility product of tin(II) carbonate is 1.03 × 10^-9, the molar solubility is 3.21 × 10^-5 M.

When a reaction shows one arrow pointing from left to right, this means ________.

Identify each of the equilibrium constant values as "Equilibrium lies to the right/products favored" or "Equilibrium lies to the left/reactants favored." -3.1 × 10^-8

The equilibrium constant expression for the reaction is ________. 2SO₃ (g) + 2CL₂ (g) 2SO₂CL₂ (g) + O₂ (g)

If the solubility of a certain salt A₂B is 1.4 × 10^-4 M, the value of the solubility product will be ________.

Consider the reaction: C (s) + CO? (g) 2 CO (g) (endothermic). Match each equilibrium change with its corresponding consequence. -expanding the reaction vessel

Increasing the concentration of hydrogen gas will ________. O₂ (g) + 2H₂ (g) 2H₂O (g)

Consider the reaction: C (s) + CO? (g) 2 CO (g) (endothermic). Match each equilibrium change with its corresponding consequence. -adding heat

What Is Chemistry

The Numerical Side of Chemistry

The Evolution of Atomic Theory

The Modern Model of the Atom

Chemical Bonding and Nomenclature

The Shape of Molecules

Intermolecular Forces and the Phases of Matter

Chemical Reactions

Stoichiometry and the Mole

Electron Transfer in Chemical Reactions

What If There Were No Intermolecular Forces - the Ideal Gas

Solutions

When Reactants Turn Into Products

Electrolytes, Acids, and Bases

Nuclear Chemistry

The Chemistry of Carbon

Synthetic and Biological Polymers

Filters

Exam 14: Chemical Equilibrium

Increasing the pressure will ________. 2H₂S (g) + 3O₂ (g) 2SO₂ (g) + 2H₂O (g)

Which statement is true about equilibrium?

Adding H₂O to the reaction vessel will ________. 2H₂S (g) + 3O₂ (g) 2SO₂ (g) + 2H₂O (g)

Decreasing the pressure will ________. 2SO₃ (g) + 2CL₂ (g) 2SO₂CL₂ (g) + O₂ (g)

Match each reaction and its equilibrium concentrations with its corresponding equilibrium constant value. -2 NH? (g) N? (g) + 3H? (g) [H?] = 0.420 M, [N?] = 0.600 M, [NH?] = 0.060 M

A reaction is approaching equilibrium when the rate of a forward reaction slows down and the rate of a reverse reaction speeds up.

A reaction that favors products has a Keq > 1.

Adding KSCN will ________. FeCL₃ (aq) + KSCN (aq) K3[Fe(SCN)6] (aq) + 3KCl (aq) Yellow colorless red colorless

If more reactants are added to a chemical reaction already at equilibrium, a shift to the products is required to restore an equilibrium condition.

Identify each of the equilibrium constant values as "Equilibrium lies to the right/products favored" or "Equilibrium lies to the left/reactants favored." -2.3 × 103

Increasing the volume will ________. 2NH₃ (g) N₂ (g) + 3H₂ (g)

A reaction is close to equilibrium when a rapid reverse reaction slows down and a slower forward reaction speeds up.

If the solubility product of tin(II) carbonate is 1.03 × 10-9, the molar solubility is 3.21 × 10-5 M.

When a reaction shows one arrow pointing from left to right, this means ________.

Identify each of the equilibrium constant values as "Equilibrium lies to the right/products favored" or "Equilibrium lies to the left/reactants favored." -3.1 × 10-8

The equilibrium constant expression for the reaction is ________. 2SO₃ (g) + 2CL₂ (g) 2SO₂CL₂ (g) + O₂ (g)

If the solubility of a certain salt A2B is 1.4 × 10-4 M, the value of the solubility product will be ________.

Consider the reaction: C (s) + CO? (g) 2 CO (g) (endothermic). Match each equilibrium change with its corresponding consequence. -expanding the reaction vessel

Increasing the concentration of hydrogen gas will ________. O₂ (g) + 2H₂ (g) 2H₂O (g)

Consider the reaction: C (s) + CO? (g) 2 CO (g) (endothermic). Match each equilibrium change with its corresponding consequence. -adding heat

What Is Chemistry

The Numerical Side of Chemistry

The Evolution of Atomic Theory

The Modern Model of the Atom

Chemical Bonding and Nomenclature

The Shape of Molecules

Intermolecular Forces and the Phases of Matter

Chemical Reactions

Stoichiometry and the Mole

Electron Transfer in Chemical Reactions

What If There Were No Intermolecular Forces - the Ideal Gas

Solutions

When Reactants Turn Into Products

Electrolytes, Acids, and Bases

Nuclear Chemistry

The Chemistry of Carbon

Synthetic and Biological Polymers

Filters

Identify each of the equilibrium constant values as "Equilibrium lies to the right/products favored" or "Equilibrium lies to the left/reactants favored." -2.3 × 10³

If the solubility product of tin(II) carbonate is 1.03 × 10^-9, the molar solubility is 3.21 × 10^-5 M.

Identify each of the equilibrium constant values as "Equilibrium lies to the right/products favored" or "Equilibrium lies to the left/reactants favored." -3.1 × 10^-8

If the solubility of a certain salt A₂B is 1.4 × 10^-4 M, the value of the solubility product will be ________.