Question 1

Nitric oxide reacts with oxygen to form nitrogen dioxide: 2 NO(g) + O2(g) ⇌ 2 NO2(g) 
What is Kc' for the reverse reaction if the equilibrium concentration of NO is 0.300 M,O2 is 0.200 M,and NO2 is 0.530 M at 25°C?

Accepted Answer

A)  0.0340
B)  0.0641
C)  0.624
D)  15.6E) B) and C)
F) None of the above

Question 2

What is the equilibrium equation for the following reaction? FeS(s) + 2 H3O+ (aq) ⇌ Fe2+(aq) + H2S (aq) + 2 H2O (l)

Accepted Answer

A)  Kc = 3O+ (aq) ⇌ Fe2+(aq) + H2S (aq) + 2 H2O (l)  
A)  Kc =   
B)  Kc =   
C)  Kc =   
D)  Kc =  " class="answers-bank-image d-inline" rel="preload" >
B)  Kc = 3O+ (aq) ⇌ Fe2+(aq) + H2S (aq) + 2 H2O (l)  
A)  Kc =   
B)  Kc =   
C)  Kc =   
D)  Kc =  " class="answers-bank-image d-inline" rel="preload" >
C)  Kc = 3O+ (aq) ⇌ Fe2+(aq) + H2S (aq) + 2 H2O (l)  
A)  Kc =   
B)  Kc =   
C)  Kc =   
D)  Kc =  " class="answers-bank-image d-inline" rel="preload" >
D)  Kc = 3O+ (aq) ⇌ Fe2+(aq) + H2S (aq) + 2 H2O (l)  
A)  Kc =   
B)  Kc =   
C)  Kc =   
D)  Kc =  " class="answers-bank-image d-inline" rel="preload" >E) B) and C)
F) A) and D)

Question 3

For acid solutions of the same molarity acid strength is proportional to the equilibrium concentration of H3O+.For equimolar solutions of acids,which equilibrium expression below corresponds to the strongest acid?

Accepted Answer

A)  Kc = 3O+.For equimolar solutions of acids,which equilibrium expression below corresponds to the strongest acid? 
A)  Kc =   = 3.5 × 10-4 
B)  Kc =   = 3.5 × 10-8 
C)  Kc =   = 4.5 × 10-4 
D)  Kc =   = 4.9 × 10-10" class="answers-bank-image d-inline" rel="preload" >= 3.5 × 10-4
B)  Kc = 3O+.For equimolar solutions of acids,which equilibrium expression below corresponds to the strongest acid? 
A)  Kc =   = 3.5 × 10-4 
B)  Kc =   = 3.5 × 10-8 
C)  Kc =   = 4.5 × 10-4 
D)  Kc =   = 4.9 × 10-10" class="answers-bank-image d-inline" rel="preload" >= 3.5 × 10-8
C)  Kc = 3O+.For equimolar solutions of acids,which equilibrium expression below corresponds to the strongest acid? 
A)  Kc =   = 3.5 × 10-4 
B)  Kc =   = 3.5 × 10-8 
C)  Kc =   = 4.5 × 10-4 
D)  Kc =   = 4.9 × 10-10" class="answers-bank-image d-inline" rel="preload" >= 4.5 × 10-4
D)  Kc = 3O+.For equimolar solutions of acids,which equilibrium expression below corresponds to the strongest acid? 
A)  Kc =   = 3.5 × 10-4 
B)  Kc =   = 3.5 × 10-8 
C)  Kc =   = 4.5 × 10-4 
D)  Kc =   = 4.9 × 10-10" class="answers-bank-image d-inline" rel="preload" >= 4.9 × 10-10E) B) and D)
F) A) and C)

Question 4

Picture (1) represents an equilibrium mixture of solid CaCO3,solid CaO,and gaseous CO2,obtained as a result of the endothermic decomposition of CaCO3. 3,solid CaO,and gaseous CO2,obtained as a result of the endothermic decomposition of CaCO3.   -For the reaction: N2(g) + 2 O2(g) ⇌ 2 NO2(g) ,Kc = 8.3 × 10-10 at 25°C.What is the concentration of N2 gas at equilibrium when the concentration of NO2 is twice the concentration of O2 gas? A) 2.1 × 10-10 M B) 4.2 × 10-10 M C) 2.4 × 109 M D) 4.8 × 109 M" class="answers-bank-image d-inline" rel="preload" >
-For the reaction: N2(g) + 2 O2(g) ⇌ 2 NO2(g) ,Kc = 8.3 × 10-10 at 25°C.What is the concentration of N2 gas at equilibrium when the concentration of NO2 is twice the concentration of O2 gas?

Accepted Answer

A)  2.1 × 10-10 M
B)  4.2 × 10-10 M
C)  2.4 × 109 M
D)  4.8 × 109 ME) All of the above
F) None of the above

Question 5

The equilibrium constant Kc for the reaction HF(aq) + H2O(l) ⇌ H3O+(aq) +F-(aq) is 3.5 × 10-4.What is the equilibrium concentration of H3O+ if the initial concentration of HF is 1.0 M?

Accepted Answer

A)  1.0 M
B)  3.5 × 10-2 M
C)  1.9 × 10-2 M
D)  1.9 × 10-4 ME) A) and D)
F) B) and D)

Question 6

Which one of the following statements does not describe the equilibrium state?

Accepted Answer

A)  Equilibrium is dynamic and there is no net conversion to reactants and products.
B)  The concentration of the reactants is equal to the concentration of the products.
C)  The concentration of the reactants and products reach a constant level.
D)  The rate of the forward reaction is equal to the rate of the reverse reaction.E) All of the above
F) None of the above

Question 7

The equilibrium equation is also known as the law of

Accepted Answer

A)  coefficients.
B)  constant concentration.
C)  dynamic equilibrium.
D)  mass action.E) A) and B)
F) A) and C)

Question 8

The following picture represents the equilibrium state for the reaction A2 + B2 ⇌ 2AB.What is the relationship between the rate constant for the forward reaction,kf,and the rate constant for the reverse reaction kr? 2 + B2 ⇌ 2AB.What is the relationship between the rate constant for the forward reaction,kf,and the rate constant for the reverse reaction kr?   A) kf r B) kf = kr = 0 C) kf = kr D) kf > kr" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  kf r
B)  kf = kr = 0
C)  kf = kr
D)  kf > krE) None of the above
F) B) and D)

Question 9

Calcium carbonate is relatively insoluble and the dissolution reaction is endothermic: CaCO3(s) ⇌ Ca2+(aq) + CO32-(aq) .
Which change in reaction condition below will shift the equilibrium to the right?

Accepted Answer

A)  add an acid to react with CO32- ion
B)  add an anion with which Ca2+ is even less soluble than calcium carbonate
C)  increase the temperature
D)  All of these will shift reaction to the right.E) All of the above
F) B) and D)

Question 10

The reaction below is heated from 20°C to 91°C,according to Le Châtelier's principle,there will be a net reaction from ________ to ________,and the brown color will become ________.
N2O4(g)⇌ 2 NO2(g)ΔH°= + 57.2 kJ
colorless brown

Accepted Answer

Question 11

An equilibrium mixture of CO,O2 and CO2 at a certain temperature contains 0.0010 M CO2 and 0.0015 M O2.At this temperature,Kc,equals 1.4 × 102 for the reaction: 2 CO(g) + O2(g) ⇌ 2 CO2(g) .
What is the equilibrium concentration of CO?

Accepted Answer

A)  4.8 × 10-6 M
B)  2.2 × 10-3 M
C)  9.3 × 10-2 M
D)  3.1 × 10-1 ME) A) and D)
F) B) and D)

Question 12

Phosphorus pentachloride decomposes to phosphorus trichloride and chlorine gas at elevated temperatures by the following reaction: PCl5(g) ⇌ PCl3(g) + Cl2(g) .If Kc = 1.8 at 250°C.
What is the value of Kp at the same temperature?

Accepted Answer

A)  4.2 × 10-2
B)  8.8 × 10-2
C)  65
D)  77E) A) and C)
F) None of the above

Question 13

At a certain temperature,Kc equals 1.4 × 102 for the reaction: 2 CO(g) + O2(g) ⇌ 2 CO2(g) .
If a 5.00-L flask contains 0.400 mol of CO2 and 0.100 mol of O2 at equilibrium,how many moles of CO are also present in the flask?

Accepted Answer

A)  1.20 mol
B)  0.239 mol
C)  0.107 mol
D)  0.0114 molE) A) and B)
F) B) and C)

Question 14

For the isomerization reaction: butane ⇌ isobutane
Kp equals 25 at 500°C.If the initial pressures of butane and isobutane are 10.atm and 0.0 atm,respectively,what are the pressures of the two gases at equilibrium?

Accepted Answer

A)  P(butane) = 0.38 atm and P(isobutane) = 9.6 atm
B)  P(butane) = 0.40 atm and P(isobutane) = 10.atm
C)  P(butane) = 9.6 atm and P(isobutane) = 0.38 atm
D)  P(butane) = 10 atm and P(isobutane) = 0.40 atmE) All of the above
F) B) and C)

Question 15

Which statement about the equilibrium constant is true? The value of Kc

Accepted Answer

A)  changes as product concentration changes.
B)  changes as reactant concentration changes.
C)  changes as temperature changes.
D)  never changes.E) A) and C)
F) All of the above

Question 16

An equilibrium mixture of CO,O2 and CO2 at a certain temperature contains 0.0010 M CO2 and 0.0020 M O2.At this temperature,Kc equals 1.4 × 102 for the reaction: 2 CO(g) + O2(g) ⇌ 2 CO2(g) .
What is the equilibrium concentration of CO?

Accepted Answer

A)  3.6 × 10-6 M
B)  1.9 × 10-3 M
C)  7.0 × 10-2 M
D)  2.6 × 10-1 ME) A) and D)
F) A) and C)

Question 17

At 1000 K,Kp = 19.9 for the reaction Fe2O3(s)+ 3 CO(g)⇌ 2 Fe(s)+ 3 CO2(g).What is the value of Kp for the reaction 8 Fe(s)+ 12 CO2(g)⇌ 4 Fe2O3(s)+ 12 CO(g)?

Accepted Answer

Question 18

If Kc is the equilibrium constant for a forward reaction what is Kc' for the reverse reaction?

Accepted Answer

A)  - Kc 
B)  Kc
C)  (Kc) -1
D)  none of theseE) C) and D)
F) None of the above

Question 19

Consider the reaction HCO3- (aq) + H2O (l) ⇌ CO3-2 (aq) + H3O+ (aq) 
The Keq for this reaction is 5.6 × 10-11.Describe what will happen to the reaction if the concentration of each reactant is
[HCO3-] = 5.6 × 10-11 [H3O+] = 1.2 × 10-11 [CO3-] = 5.6 × 10-11

Accepted Answer

A)  Reaction will shift right,concentration of products will increase.
B)  Reaction will shift left,concentration of reactants will increase.
C)  Reaction will not change,it is at equilibrium.
D)  Not enough information to determine the answer.E) A) and B)
F) All of the above

Question 20

The following pictures represent mixtures of cis-C2H2X2 molecules and trans-C2H2X2 molecules,which interconvert according to the equation cis-C2H2X2 ⇌ trans-C2H2X2.If mixture (1) is at equilibrium,which of the other mixtures are also at equilibrium? 2H2X2 molecules and trans-C2H2X2 molecules,which interconvert according to the equation cis-C2H2X2 ⇌ trans-C2H2X2.If mixture (1) is at equilibrium,which of the other mixtures are also at equilibrium?   A) mixture (2)  B) mixture (3)  C) mixture (4)  D) None of the other mixtures are at equilibrium." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  mixture (2) 
B)  mixture (3) 
C)  mixture (4) 
D)  None of the other mixtures are at equilibrium.E) B) and D)
F) B) and C)

Exam 14: Chemical Equilibrium

Phosphorus pentachloride decomposes to phosphorus trichloride and chlorine gas at elevated temperatures by the following reaction: PCl₅(g) ⇌ PCl₃(g) + Cl₂(g) .If K_c = 1.8 at 250°C. What is the value of K_p at the same temperature?

Correct Answer
verified

An equilibrium mixture of CO,O₂ and CO₂ at a certain temperature contains 0.0010 M CO₂ and 0.0020 M O₂.At this temperature,K_c equals 1.4 × 10² for the reaction: 2 CO(g) + O₂(g) ⇌ 2 CO₂(g) . What is the equilibrium concentration of CO?

Correct Answer
verified

What is the equilibrium equation for the following reaction? FeS(s) + 2 H₃O⁺ (aq) ⇌ Fe²⁺(aq) + H₂S (aq) + 2 H₂O (l)

Correct Answer
verified

The reaction below is heated from 20°C to 91°C,according to Le Châtelier's principle,there will be a net reaction from to ,and the brown color will become . N₂O₄(g)⇌ 2 NO₂(g)ΔH°= + 57.2 kJ colorless brown

Correct Answer
verified

The equilibrium equation is also known as the law of

Correct Answer
verified

The equilibrium constant K_cfor the reaction HF(aq) + H₂O(l) ⇌ H₃O⁺(aq) +F^-(aq) is 3.5 × 10^-4.What is the equilibrium concentration of H₃O⁺ if the initial concentration of HF is 1.0 M?

Correct Answer
verified

An equilibrium mixture of CO,O₂ and CO₂ at a certain temperature contains 0.0010 M CO₂ and 0.0015 M O₂.At this temperature,K_c,equals 1.4 × 10² for the reaction: 2 CO(g) + O₂(g) ⇌ 2 CO₂(g) . What is the equilibrium concentration of CO?

Correct Answer
verified

For acid solutions of the same molarity acid strength is proportional to the equilibrium concentration of H₃O⁺.For equimolar solutions of acids,which equilibrium expression below corresponds to the strongest acid?

Correct Answer
verified

At 1000 K,K_p = 19.9 for the reaction Fe₂O₃(s)+ 3 CO(g)⇌ 2 Fe(s)+ 3 CO₂(g).What is the value of K_p for the reaction 8 Fe(s)+ 12 CO₂(g)⇌ 4 Fe₂O₃(s)+ 12 CO(g)?

Correct Answer
verified

Which statement about the equilibrium constant is true? The value of K_c

Correct Answer
verified

For the isomerization reaction: butane ⇌ isobutane K_p equals 25 at 500°C.If the initial pressures of butane and isobutane are 10.atm and 0.0 atm,respectively,what are the pressures of the two gases at equilibrium?

Correct Answer
verified

The following pictures represent mixtures of cis-C₂H₂X₂ molecules and trans-C₂H₂X₂molecules,which interconvert according to the equation cis-C₂H₂X₂ ⇌ trans-C₂H₂X₂.If mixture (1) is at equilibrium,which of the other mixtures are also at equilibrium?

Correct Answer
verified

The following picture represents the equilibrium state for the reaction A₂ + B₂ ⇌ 2AB.What is the relationship between the rate constant for the forward reaction,k_f,and the rate constant for the reverse reaction k_r?

Correct Answer
verified

Consider the reaction HCO₃^- (aq) + H₂O (l) ⇌ CO₃^-2 (aq) + H₃O+ (aq) The K_eq for this reaction is 5.6 × 10^-11.Describe what will happen to the reaction if the concentration of each reactant is [HCO₃^-] = 5.6 × 10^-11[H₃O⁺] = 1.2 × 10^-11[CO₃^-] = 5.6 × 10^-11

Correct Answer
verified

Nitric oxide reacts with oxygen to form nitrogen dioxide: 2 NO(g) + O₂(g) ⇌ 2 NO₂(g) What is K_c'for the reverse reaction if the equilibrium concentration of NO is 0.300 M,O₂ is 0.200 M,and NO₂ is 0.530 M at 25°C?

Correct Answer
verified

Correct Answer
verified

Which one of the following statements does not describe the equilibrium state?

Correct Answer
verified

At a certain temperature,K_c equals 1.4 × 10² for the reaction: 2 CO(g) + O₂(g) ⇌ 2 CO₂(g) . If a 5.00-L flask contains 0.400 mol of CO₂ and 0.100 mol of O₂ at equilibrium,how many moles of CO are also present in the flask?

Correct Answer
verified

Calcium carbonate is relatively insoluble and the dissolution reaction is endothermic: CaCO₃(s) ⇌ Ca²⁺(aq) + CO₃^2-(aq) . Which change in reaction condition below will shift the equilibrium to the right?

Correct Answer
verified

If K_c is the equilibrium constant for a forward reaction what is K_c' for the reverse reaction?

Correct Answer
verified

Exam 14: Chemical Equilibrium

Phosphorus pentachloride decomposes to phosphorus trichloride and chlorine gas at elevated temperatures by the following reaction: PCl5(g) ⇌ PCl3(g) + Cl2(g) .If Kc = 1.8 at 250°C. What is the value of Kp at the same temperature?

Correct AnswerverifiedShow Answer

An equilibrium mixture of CO,O2 and CO2 at a certain temperature contains 0.0010 M CO2 and 0.0020 M O2.At this temperature,Kc equals 1.4 × 102 for the reaction: 2 CO(g) + O2(g) ⇌ 2 CO2(g) . What is the equilibrium concentration of CO?

Correct AnswerverifiedShow Answer

What is the equilibrium equation for the following reaction? FeS(s) + 2 H3O+ (aq) ⇌ Fe2+(aq) + H2S (aq) + 2 H2O (l)

Correct AnswerverifiedShow Answer

The reaction below is heated from 20°C to 91°C,according to Le Châtelier's principle,there will be a net reaction from ________ to ________,and the brown color will become ________. N2O4(g)⇌ 2 NO2(g)ΔH°= + 57.2 kJ colorless brown

Correct AnswerverifiedShow Answer

The equilibrium equation is also known as the law of

Correct AnswerverifiedShow Answer

The equilibrium constant Kc for the reaction HF(aq) + H2O(l) ⇌ H3O+(aq) +F-(aq) is 3.5 × 10-4.What is the equilibrium concentration of H3O+ if the initial concentration of HF is 1.0 M?

Correct AnswerverifiedShow Answer

An equilibrium mixture of CO,O2 and CO2 at a certain temperature contains 0.0010 M CO2 and 0.0015 M O2.At this temperature,Kc,equals 1.4 × 102 for the reaction: 2 CO(g) + O2(g) ⇌ 2 CO2(g) . What is the equilibrium concentration of CO?

Correct AnswerverifiedShow Answer

For acid solutions of the same molarity acid strength is proportional to the equilibrium concentration of H3O+.For equimolar solutions of acids,which equilibrium expression below corresponds to the strongest acid?

Correct AnswerverifiedShow Answer

At 1000 K,Kp = 19.9 for the reaction Fe2O3(s)+ 3 CO(g)⇌ 2 Fe(s)+ 3 CO2(g).What is the value of Kp for the reaction 8 Fe(s)+ 12 CO2(g)⇌ 4 Fe2O3(s)+ 12 CO(g)?

Correct AnswerverifiedShow Answer

Which statement about the equilibrium constant is true? The value of Kc

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For the isomerization reaction: butane ⇌ isobutane Kp equals 25 at 500°C.If the initial pressures of butane and isobutane are 10.atm and 0.0 atm,respectively,what are the pressures of the two gases at equilibrium?

Correct AnswerverifiedShow Answer

The following pictures represent mixtures of cis-C2H2X2 molecules and trans-C2H2X2 molecules,which interconvert according to the equation cis-C2H2X2 ⇌ trans-C2H2X2.If mixture (1) is at equilibrium,which of the other mixtures are also at equilibrium?

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The following picture represents the equilibrium state for the reaction A2 + B2 ⇌ 2AB.What is the relationship between the rate constant for the forward reaction,kf,and the rate constant for the reverse reaction kr?

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Consider the reaction HCO3- (aq) + H2O (l) ⇌ CO3-2 (aq) + H3O+ (aq) The Keq for this reaction is 5.6 × 10-11.Describe what will happen to the reaction if the concentration of each reactant is [HCO3-] = 5.6 × 10-11 [H3O+] = 1.2 × 10-11 [CO3-] = 5.6 × 10-11

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Nitric oxide reacts with oxygen to form nitrogen dioxide: 2 NO(g) + O2(g) ⇌ 2 NO2(g) What is Kc' for the reverse reaction if the equilibrium concentration of NO is 0.300 M,O2 is 0.200 M,and NO2 is 0.530 M at 25°C?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which one of the following statements does not describe the equilibrium state?

Correct AnswerverifiedShow Answer

At a certain temperature,Kc equals 1.4 × 102 for the reaction: 2 CO(g) + O2(g) ⇌ 2 CO2(g) . If a 5.00-L flask contains 0.400 mol of CO2 and 0.100 mol of O2 at equilibrium,how many moles of CO are also present in the flask?

Correct AnswerverifiedShow Answer

Calcium carbonate is relatively insoluble and the dissolution reaction is endothermic: CaCO3(s) ⇌ Ca2+(aq) + CO32-(aq) . Which change in reaction condition below will shift the equilibrium to the right?

Correct AnswerverifiedShow Answer

If Kc is the equilibrium constant for a forward reaction what is Kc' for the reverse reaction?

Correct AnswerverifiedShow Answer

Phosphorus pentachloride decomposes to phosphorus trichloride and chlorine gas at elevated temperatures by the following reaction: PCl₅(g) ⇌ PCl₃(g) + Cl₂(g) .If K_c = 1.8 at 250°C. What is the value of K_p at the same temperature?

Correct Answer
verified

An equilibrium mixture of CO,O₂ and CO₂ at a certain temperature contains 0.0010 M CO₂ and 0.0020 M O₂.At this temperature,K_c equals 1.4 × 10² for the reaction: 2 CO(g) + O₂(g) ⇌ 2 CO₂(g) . What is the equilibrium concentration of CO?

Correct Answer
verified

What is the equilibrium equation for the following reaction? FeS(s) + 2 H₃O⁺ (aq) ⇌ Fe²⁺(aq) + H₂S (aq) + 2 H₂O (l)

Correct Answer
verified

The reaction below is heated from 20°C to 91°C,according to Le Châtelier's principle,there will be a net reaction from to ,and the brown color will become . N₂O₄(g)⇌ 2 NO₂(g)ΔH°= + 57.2 kJ colorless brown

Correct Answer
verified

Correct Answer
verified

The equilibrium constant K_cfor the reaction HF(aq) + H₂O(l) ⇌ H₃O⁺(aq) +F^-(aq) is 3.5 × 10^-4.What is the equilibrium concentration of H₃O⁺ if the initial concentration of HF is 1.0 M?

Correct Answer
verified

An equilibrium mixture of CO,O₂ and CO₂ at a certain temperature contains 0.0010 M CO₂ and 0.0015 M O₂.At this temperature,K_c,equals 1.4 × 10² for the reaction: 2 CO(g) + O₂(g) ⇌ 2 CO₂(g) . What is the equilibrium concentration of CO?

Correct Answer
verified

For acid solutions of the same molarity acid strength is proportional to the equilibrium concentration of H₃O⁺.For equimolar solutions of acids,which equilibrium expression below corresponds to the strongest acid?

Correct Answer
verified

At 1000 K,K_p = 19.9 for the reaction Fe₂O₃(s)+ 3 CO(g)⇌ 2 Fe(s)+ 3 CO₂(g).What is the value of K_p for the reaction 8 Fe(s)+ 12 CO₂(g)⇌ 4 Fe₂O₃(s)+ 12 CO(g)?

Correct Answer
verified

Which statement about the equilibrium constant is true? The value of K_c

Correct Answer
verified

For the isomerization reaction: butane ⇌ isobutane K_p equals 25 at 500°C.If the initial pressures of butane and isobutane are 10.atm and 0.0 atm,respectively,what are the pressures of the two gases at equilibrium?

Correct Answer
verified

The following pictures represent mixtures of cis-C₂H₂X₂ molecules and trans-C₂H₂X₂molecules,which interconvert according to the equation cis-C₂H₂X₂ ⇌ trans-C₂H₂X₂.If mixture (1) is at equilibrium,which of the other mixtures are also at equilibrium?

Correct Answer
verified

The following picture represents the equilibrium state for the reaction A₂ + B₂ ⇌ 2AB.What is the relationship between the rate constant for the forward reaction,k_f,and the rate constant for the reverse reaction k_r?

Correct Answer
verified

Consider the reaction HCO₃^- (aq) + H₂O (l) ⇌ CO₃^-2 (aq) + H₃O+ (aq) The K_eq for this reaction is 5.6 × 10^-11.Describe what will happen to the reaction if the concentration of each reactant is [HCO₃^-] = 5.6 × 10^-11[H₃O⁺] = 1.2 × 10^-11[CO₃^-] = 5.6 × 10^-11

Correct Answer
verified

Nitric oxide reacts with oxygen to form nitrogen dioxide: 2 NO(g) + O₂(g) ⇌ 2 NO₂(g) What is K_c'for the reverse reaction if the equilibrium concentration of NO is 0.300 M,O₂ is 0.200 M,and NO₂ is 0.530 M at 25°C?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

At a certain temperature,K_c equals 1.4 × 10² for the reaction: 2 CO(g) + O₂(g) ⇌ 2 CO₂(g) . If a 5.00-L flask contains 0.400 mol of CO₂ and 0.100 mol of O₂ at equilibrium,how many moles of CO are also present in the flask?

Correct Answer
verified

Calcium carbonate is relatively insoluble and the dissolution reaction is endothermic: CaCO₃(s) ⇌ Ca²⁺(aq) + CO₃^2-(aq) . Which change in reaction condition below will shift the equilibrium to the right?

Correct Answer
verified

If K_c is the equilibrium constant for a forward reaction what is K_c' for the reverse reaction?

Correct Answer
verified