Question 1

The reaction below has a Kp value of 3.3 × 10-5.What is the value of Kc for this reaction at 700 K? 2 SO3(g)⇌ 2 SO2(g)+ O2(g)

Accepted Answer

A)  5.7 × 10-7 
B)  1.7 × 106 
C)  3.3 × 10-5 
D)  3.0 × 104 
E)  1.9 × 10-3 
A)  5.7 × 10-7 
B)  1.7 × 106 
C)  3.3 × 10-5 
D)  3.0 × 104 
E)  1.9 × 10-3

Question 2

Consider the following reaction at equilibrium.What effect will reducing the volume of the reaction mixture have on the system? CuS(s)+ O2(g)⇌ Cu(s)+ SO2(g)

Accepted Answer

A)  The equilibrium constant will decrease. 
B)  No effect will be observed. 
C)  The reaction will shift to the right in the direction of products. 
D)  The equilibrium constant will increase. 
E)  The reaction will shift to the left in the direction of reactants. 
A)  The equilibrium constant will decrease. 
B)  No effect will be observed. 
C)  The reaction will shift to the right in the direction of products. 
D)  The equilibrium constant will increase. 
E)  The reaction will shift to the left in the direction of reactants.

Question 3

The reaction below has a Kc value of 61.What is the value of Kp for this reaction at 400 K? N2(g)+ 3 H2(g)⇌ 2 NH3(g)

Accepted Answer

A)  15 
B)  61 
C)  1.8 
D)  5.7 × 10-2 
E)  1.9 × 10-2 
A)  15 
B)  61 
C)  1.8 
D)  5.7 × 10-2 
E)  1.9 × 10-2

Question 4

Hemoglobin carries ________ in the blood.

Accepted Answer

A)  nitrogen 
B)  hydrogen 
C)  oxygen 
D)  carbon 
E)  sodium 
A)  nitrogen 
B)  hydrogen 
C)  oxygen 
D)  carbon 
E)  sodium

Question 5

In a reaction mixture containing only reactants,what is the value of Q?

Accepted Answer

A)  -1 
B)  1 
C)  ∞ 
D)  0 
E)  It cannot be determined without concentrations. 
A)  -1 
B)  1 
C)  ∞ 
D)  0 
E)  It cannot be determined without concentrations.

Question 6

What is Δn for the following equation in relating Kc to Kp? 4 NH3(g)+ 3 O2(g)⇌ 2 N2(g)+ 6 H2O(g)

Accepted Answer

A)  -3 
B)  0 
C)  -2 
D)  -5 
E)  1 
A)  -3 
B)  0 
C)  -2 
D)  -5 
E)  1

Question 7

What is Δn for the following equation in relating Kc to Kp? 2 SO3(g)⇌ 2 SO2(g)+ O2(g)

Accepted Answer

A)  -3 
B)  1 
C)  -2 
D)  0 
E)  -4 
A)  -3 
B)  1 
C)  -2 
D)  0 
E)  -4

Question 8

Consider the following reaction at equilibrium.What effect will removing H2O have on the system? 2 H2S(g)+ 3 O2(g)⇌ 2 H2O(g)+ 2 SO2(g)

Accepted Answer

A)  The reaction will shift to the left. 
B)  No change will be observed. 
C)  The equilibrium constant will decrease. 
D)  The equilibrium constant will increase. 
E)  The reaction will shift in the direction of products. 
A)  The reaction will shift to the left. 
B)  No change will be observed. 
C)  The equilibrium constant will decrease. 
D)  The equilibrium constant will increase. 
E)  The reaction will shift in the direction of products.

Question 9

In which of the following reactions will Kc = Kp?

Accepted Answer

A)  4 NH3(g) + 3 O2(g) ⇌ 2 N2(g) + 6 H2O(g) 
B)  SO3(g) + NO(g) ⇌ SO2(g) + NO2(g) 
C)  2 N2(g) + O2(g) ⇌ 2 N2O(g) 
D)  2 SO2(g) + O2(g) ⇌ 2 SO3(g) 
E)  None of the above reactions have Kc = Kp. 
A)  4 NH3(g) + 3 O2(g) ⇌ 2 N2(g) + 6 H2O(g) 
B)  SO3(g) + NO(g) ⇌ SO2(g) + NO2(g) 
C)  2 N2(g) + O2(g) ⇌ 2 N2O(g) 
D)  2 SO2(g) + O2(g) ⇌ 2 SO3(g) 
E)  None of the above reactions have Kc = Kp.

Question 10

Consider the following reaction,equilibrium concentrations,and equilibrium constant at a particular temperature.Determine the equilibrium concentration of NO2(g). N2O4(g)⇌ 2 NO2(g)Kc = 0.21
[N2O4]eq = 0.033 M

Accepted Answer

A)  1.44 M 
B)  8.3 × 10-2 M 
C)  12 × 10-2 M 
D)  6.9 × 10-3 M 
E)  144 M 
A)  1.44 M 
B)  8.3 × 10-2 M 
C)  12 × 10-2 M 
D)  6.9 × 10-3 M 
E)  144 M

Question 11

Kc is 1.67 × 1020 at 25°C for the formation of iron(III)oxalate complex ion: Fe3+(aq)+ 3 C2O42-(aq)⇌ [Fe(C2O4)3]3-(aq).
If 0.0200 M Fe3+ is initially mixed with 1.00 M oxalate ion,what is the concentration of Fe3+ ion at equilibrium?

Accepted Answer

A)  1.44 × 10-22 M 
B)  0.0100 M 
C)  8.35 × 1019 M 
D)  6.94 × 1021 M 
A)  1.44 × 10-22 M 
B)  0.0100 M 
C)  8.35 × 1019 M 
D)  6.94 × 1021 M

Question 12

Express the equilibrium constant for the following reaction. 10 PCl5(g)⇌ 10 PCl3(g)+ 10 Cl2(g)

Accepted Answer

A)  K =   
B)  K =   
C)  K =   
D)  K =   
E)  K =   
  
A)  K =   
B)  K =   
C)  K =   
D)  K =   
E)  K =

Question 13

Consider the following reaction at equilibrium.What effect will increasing the volume of the reaction mixture have on the system? 2 H2S(g)+ 3 O2(g)⇌ 2 H2O(g)+ 2 SO2(g)

Accepted Answer

A)  The reaction will shift to the right in the direction of products. 
B)  No effect will be observed. 
C)  The reaction will shift to the left in the direction of reactants. 
D)  The equilibrium constant will decrease. 
E)  The equilibrium constant will increase. 
A)  The reaction will shift to the right in the direction of products. 
B)  No effect will be observed. 
C)  The reaction will shift to the left in the direction of reactants. 
D)  The equilibrium constant will decrease. 
E)  The equilibrium constant will increase.

Question 14

The following reaction is exothermic.Which change will shift the equilibrium to the left? 2 SO2(g)+ O2(g)⇌ 2 SO3(g)

Accepted Answer

A)  increase the volume 
B)  adding He 
C)  decrease the volume 
D)  all of the above 
E)  none of the above 
A)  increase the volume 
B)  adding He 
C)  decrease the volume 
D)  all of the above 
E)  none of the above

Question 15

Express the equilibrium constant for the following reaction. 5 P4O10(s)⇌ 5 P4(s)+ 25 O2(g)

Accepted Answer

A)  K =   
B)  K =   
C)  K =   
D)  K = [O2]25 
E)  K =   
A)  K =   
B)  K =   
C)  K =   
D)  K = [O2]25 
E)  K =

Question 16

Express the equilibrium constant for the following reaction. 4 Al(s)+ 3 O2(g)⇌ 2 Al2O3(s)

Accepted Answer

A)  K =   
B)  K =   
C)  K =   
D)  K = [O2]3 
E)  K = [3O2]3 
A)  K =   
B)  K =   
C)  K =   
D)  K = [O2]3 
E)  K = [3O2]3

Question 17

Express the equilibrium constant for the following reaction. 6 Na(s)+ 6 H2O(l)⇌ 6 NaOH(aq)+ 3 H2(g)

Accepted Answer

A)  K =   
B)  K = [H2][NaOH]-2 
C)  K =   
  
D)  K = [H2]3[NaOH]6 
E)  K =   
A)  K =   
B)  K = [H2][NaOH]-2 
C)  K =   
  
D)  K = [H2]3[NaOH]6 
E)  K =

Question 18

Determine the value of Kc for the following reaction if the equilibrium concentrations are as follows: [P4O10]eq = 2.000 moles,[P4]eq = 3.000 moles,[O2]eq = 4.000 M P4O10(s)⇌ P4(s)+ 5 O2(g)

Accepted Answer

A)  20.00 
B)  4.000 
C)  1.320 
D)  1536 
E)  1024 
A)  20.00 
B)  4.000 
C)  1.320 
D)  1536 
E)  1024

Question 19

What is Δn for the following equation in relating Kc to Kp? CH4(g)+ H2O(g)⇌ CO(g)+ 3 H2(g)

Accepted Answer

A)  4 
B)  1 
C)  1/2 
D)  2 
E)  -1/3 
A)  4 
B)  1 
C)  1/2 
D)  2 
E)  -1/3

Question 20

Consider the following reaction at equilibrium.What effect will adding CO2 have on the system? CO2(g)+ C(graphite)⇌ 2 CO(g)

Accepted Answer

A)  No effect will be observed since CO2 is not included in the equilibrium expression. 
B)  The equilibrium constant will decrease. 
C)  The reaction will shift to the left in the direction of reactants. 
D)  The equilibrium constant will increase. 
E)  The reaction will shift to the right in the direction of products. 
A)  No effect will be observed since CO2 is not included in the equilibrium expression. 
B)  The equilibrium constant will decrease. 
C)  The reaction will shift to the left in the direction of reactants. 
D)  The equilibrium constant will increase. 
E)  The reaction will shift to the right in the direction of products.

Exam 15: Chemical Equilibrium

The reaction below has a Kp value of 3.3 × 10-5.What is the value of Kc for this reaction at 700 K? 2 SO3(g)⇌ 2 SO2(g)+ O2(g)

Consider the following reaction at equilibrium.What effect will reducing the volume of the reaction mixture have on the system? CuS(s)+ O2(g)⇌ Cu(s)+ SO2(g)

The reaction below has a Kc value of 61.What is the value of Kp for this reaction at 400 K? N2(g)+ 3 H2(g)⇌ 2 NH3(g)

Hemoglobin carries ________ in the blood.

In a reaction mixture containing only reactants,what is the value of Q?

What is Δn for the following equation in relating Kc to Kp? 4 NH3(g)+ 3 O2(g)⇌ 2 N2(g)+ 6 H2O(g)

What is Δn for the following equation in relating Kc to Kp? 2 SO3(g)⇌ 2 SO2(g)+ O2(g)

Consider the following reaction at equilibrium.What effect will removing H2O have on the system? 2 H2S(g)+ 3 O2(g)⇌ 2 H2O(g)+ 2 SO2(g)

In which of the following reactions will Kc = Kp?

Consider the following reaction,equilibrium concentrations,and equilibrium constant at a particular temperature.Determine the equilibrium concentration of NO2(g). N2O4(g)⇌ 2 NO2(g)Kc = 0.21 [N2O4]eq = 0.033 M

Kc is 1.67 × 1020 at 25°C for the formation of iron(III)oxalate complex ion: Fe3+(aq)+ 3 C2O42-(aq)⇌ [Fe(C2O4)3]3-(aq). If 0.0200 M Fe3+ is initially mixed with 1.00 M oxalate ion,what is the concentration of Fe3+ ion at equilibrium?

Express the equilibrium constant for the following reaction. 10 PCl5(g)⇌ 10 PCl3(g)+ 10 Cl2(g)

Consider the following reaction at equilibrium.What effect will increasing the volume of the reaction mixture have on the system? 2 H2S(g)+ 3 O2(g)⇌ 2 H2O(g)+ 2 SO2(g)

The following reaction is exothermic.Which change will shift the equilibrium to the left? 2 SO2(g)+ O2(g)⇌ 2 SO3(g)

Express the equilibrium constant for the following reaction. 5 P4O10(s)⇌ 5 P4(s)+ 25 O2(g)

Express the equilibrium constant for the following reaction. 4 Al(s)+ 3 O2(g)⇌ 2 Al2O3(s)

Express the equilibrium constant for the following reaction. 6 Na(s)+ 6 H2O(l)⇌ 6 NaOH(aq)+ 3 H2(g)

Determine the value of Kc for the following reaction if the equilibrium concentrations are as follows: [P4O10]eq = 2.000 moles,[P4]eq = 3.000 moles,[O2]eq = 4.000 M P4O10(s)⇌ P4(s)+ 5 O2(g)

What is Δn for the following equation in relating Kc to Kp? CH4(g)+ H2O(g)⇌ CO(g)+ 3 H2(g)

Consider the following reaction at equilibrium.What effect will adding CO2 have on the system? CO2(g)+ C(graphite)⇌ 2 CO(g)

Matter, measurement, and Problem Solving

Atoms and Elements

Molecules,compounds,and Chemical Equations

Chemical Quantities and Aqueous Reactions

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes,valence Bond Theory,

Liquids,solids,and Intermolecular Forces

Solids and Modern Materials

Solutions

Chemical Kinetics

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

The reaction below has a K_p value of 3.3 × 10^-5.What is the value of K_c for this reaction at 700 K? 2 SO₃(g)⇌ 2 SO₂(g)+ O₂(g)

Consider the following reaction at equilibrium.What effect will reducing the volume of the reaction mixture have on the system? CuS(s)+ O₂(g)⇌ Cu(s)+ SO₂(g)

The reaction below has a K_c value of 61.What is the value of K_p for this reaction at 400 K? N₂(g)+ 3 H₂(g)⇌ 2 NH₃(g)

What is Δn for the following equation in relating K_c to K_p? 4 NH₃(g)+ 3 O₂(g)⇌ 2 N₂(g)+ 6 H₂O(g)

What is Δn for the following equation in relating K_c to K_p? 2 SO₃(g)⇌ 2 SO₂(g)+ O₂(g)

Consider the following reaction at equilibrium.What effect will removing H₂O have on the system? 2 H₂S(g)+ 3 O₂(g)⇌ 2 H₂O(g)+ 2 SO₂(g)

In which of the following reactions will K_c = K_p?

Consider the following reaction,equilibrium concentrations,and equilibrium constant at a particular temperature.Determine the equilibrium concentration of NO₂(g). N₂O₄(g)⇌ 2 NO₂(g)K_c = 0.21 [N₂O₄]_eq = 0.033 M

K_c is 1.67 × 10²⁰ at 25°C for the formation of iron(III)oxalate complex ion: Fe³⁺(aq)+ 3 C₂O₄^2-(aq)⇌ [Fe(C₂O₄)₃]^3-(aq). If 0.0200 M Fe³⁺ is initially mixed with 1.00 M oxalate ion,what is the concentration of Fe³⁺ ion at equilibrium?

Express the equilibrium constant for the following reaction. 10 PCl₅(g)⇌ 10 PCl₃(g)+ 10 Cl₂(g)

Consider the following reaction at equilibrium.What effect will increasing the volume of the reaction mixture have on the system? 2 H₂S(g)+ 3 O₂(g)⇌ 2 H₂O(g)+ 2 SO₂(g)

The following reaction is exothermic.Which change will shift the equilibrium to the left? 2 SO₂(g)+ O₂(g)⇌ 2 SO₃(g)

Express the equilibrium constant for the following reaction. 5 P₄O₁₀(s)⇌ 5 P₄(s)+ 25 O₂(g)

Express the equilibrium constant for the following reaction. 4 Al(s)+ 3 O₂(g)⇌ 2 Al₂O₃(s)

Express the equilibrium constant for the following reaction. 6 Na(s)+ 6 H₂O(l)⇌ 6 NaOH(aq)+ 3 H₂(g)

Determine the value of K_c for the following reaction if the equilibrium concentrations are as follows: [P₄O₁₀]_eq= 2.000 moles,[P₄]_eq = 3.000 moles,[O₂]_eq = 4.000 M P₄O₁₀(s)⇌ P₄(s)+ 5 O₂(g)

What is Δn for the following equation in relating K_c to K_p? CH₄(g)+ H₂O(g)⇌ CO(g)+ 3 H₂(g)

Consider the following reaction at equilibrium.What effect will adding CO₂ have on the system? CO₂(g)+ C(graphite)⇌ 2 CO(g)