Question 1

At a given temperature,0.0664 mol N2O4(g) is placed in a 1.00 L flask.After reaching equilibrium,the concentration of NO2(g) is 6.1 × 10-3 M.What is Kc for the reaction below? N2O4(g)  2O4(g) is placed in a 1.00 L flask.After reaching equilibrium,the concentration of NO2(g) is 6.1 × 10-3 M.What is Kc for the reaction below? N2O4(g)    2 NO2(g)  A)  3.7 ×10-5 B)  1.4 ×10-4 C)  5.9 × 10-4 D)  9.6 × 10-2 E)  1.8 × 103" class="answers-bank-image d-inline" rel="preload" > 2 NO2(g)

Accepted Answer

A)   3.7 ×10-5
B)   1.4 ×10-4
C)   5.9 × 10-4
D)   9.6 × 10-2
E)   1.8 × 103

Question 2

A 2.5 L flask is filled with 0.25 mol SO3,0.20 mol SO2,and 0.40 mol O2,and allowed to reach equilibrium.Assume the temperature of the mixture is chosen so that Kc = 0.12.Predict the effect on the concentration of SO3 as equilibrium is achieved by using Q,the reaction quotient. 2 SO3(g)  3,0.20 mol SO2,and 0.40 mol O2,and allowed to reach equilibrium.Assume the temperature of the mixture is chosen so that Kc = 0.12.Predict the effect on the concentration of SO3 as equilibrium is achieved by using Q,the reaction quotient. 2 SO3(g)    2 SO2(g) + O2(g)  A)  [SO3] will decrease because Q > K. B)  [SO3] will decrease because Q 3] will increase because Q 3] will increase because Q > K. E)  [SO3] will remain the same because Q = K." class="answers-bank-image d-inline" rel="preload" > 2 SO2(g) + O2(g)

Accepted Answer

A)   [SO3] will decrease because Q > K.
B)   [SO3] will decrease because Q 
C)   [SO3] will increase because Q 
D)   [SO3] will increase because Q > K.
E)   [SO3] will remain the same because Q = K.

Question 3

Given the equilibrium constants for the following reactions: 4Cu(s) + O2(g)  2(g)    2Cu2O(s) ,K1 4CuO(s)    2Cu2O(s) + O2(g) ,K2 What is K for the system 2Cu(s) + O2(g)    2CuO(s)  Equivalent to? A)      B)    C)  (K1) (K2)  D)      E)   " class="answers-bank-image d-inline" rel="preload" > 2Cu2O(s) ,K1
4CuO(s)  2(g)    2Cu2O(s) ,K1 4CuO(s)    2Cu2O(s) + O2(g) ,K2 What is K for the system 2Cu(s) + O2(g)    2CuO(s)  Equivalent to? A)      B)    C)  (K1) (K2)  D)      E)   " class="answers-bank-image d-inline" rel="preload" > 2Cu2O(s) + O2(g) ,K2
What is K for the system
2Cu(s) + O2(g)  2(g)    2Cu2O(s) ,K1 4CuO(s)    2Cu2O(s) + O2(g) ,K2 What is K for the system 2Cu(s) + O2(g)    2CuO(s)  Equivalent to? A)      B)    C)  (K1) (K2)  D)      E)   " class="answers-bank-image d-inline" rel="preload" > 2CuO(s) 
Equivalent to?

Accepted Answer

A)   2(g)    2Cu2O(s) ,K1 4CuO(s)    2Cu2O(s) + O2(g) ,K2 What is K for the system 2Cu(s) + O2(g)    2CuO(s)  Equivalent to? 
A)       
B)     
C)   (K1) (K2)  
D)       
E)    " class="answers-bank-image d-inline" rel="preload" > 2(g)    2Cu2O(s) ,K1 4CuO(s)    2Cu2O(s) + O2(g) ,K2 What is K for the system 2Cu(s) + O2(g)    2CuO(s)  Equivalent to? 
A)       
B)     
C)   (K1) (K2)  
D)       
E)    " class="answers-bank-image d-inline" rel="preload" >
B)   2(g)    2Cu2O(s) ,K1 4CuO(s)    2Cu2O(s) + O2(g) ,K2 What is K for the system 2Cu(s) + O2(g)    2CuO(s)  Equivalent to? 
A)       
B)     
C)   (K1) (K2)  
D)       
E)    " class="answers-bank-image d-inline" rel="preload" >
C)   (K1) (K2) 
D)   2(g)    2Cu2O(s) ,K1 4CuO(s)    2Cu2O(s) + O2(g) ,K2 What is K for the system 2Cu(s) + O2(g)    2CuO(s)  Equivalent to? 
A)       
B)     
C)   (K1) (K2)  
D)       
E)    " class="answers-bank-image d-inline" rel="preload" > 2(g)    2Cu2O(s) ,K1 4CuO(s)    2Cu2O(s) + O2(g) ,K2 What is K for the system 2Cu(s) + O2(g)    2CuO(s)  Equivalent to? 
A)       
B)     
C)   (K1) (K2)  
D)       
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   2(g)    2Cu2O(s) ,K1 4CuO(s)    2Cu2O(s) + O2(g) ,K2 What is K for the system 2Cu(s) + O2(g)    2CuO(s)  Equivalent to? 
A)       
B)     
C)   (K1) (K2)  
D)       
E)    " class="answers-bank-image d-inline" rel="preload" > A

Question 4

If the reaction quotient,Q,is equal to K in a gas phase reaction,then

Accepted Answer

A)   the chemical system has reached equilibrium.
B)   the temperature must be increased for the reaction to proceed in the forward direction.
C)   the reaction will proceed in the forward direction until equilibrium is established.
D)   the reaction will proceed in the backward direction until equilibrium is established.
E)   the reaction will proceed in the direction that increases the number of gas phase particles.

Question 5

Write a balanced chemical equation which corresponds to the following equilibrium constant expression. 2(aq) + H2O(   )    NO2-(aq) + H3O+(aq)  B)  NO2-(aq) + H3O+(aq)    HNO2(aq) + H2O(   )  C)  NO2-(aq) + H3O+(aq)    HNO2(aq)  D)  H+(aq) + OH-(aq)    H2O(   )  E)  HNO2(aq)    NO2-(aq) + H3O+(aq) " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   HNO2(aq) + H2O( 2(aq) + H2O(   )    NO2-(aq) + H3O+(aq)  
B)   NO2-(aq) + H3O+(aq)    HNO2(aq) + H2O(   )  
C)   NO2-(aq) + H3O+(aq)    HNO2(aq)  
D)   H+(aq) + OH-(aq)    H2O(   )  
E)   HNO2(aq)    NO2-(aq) + H3O+(aq) " class="answers-bank-image d-inline" rel="preload" > )  2(aq) + H2O(   )    NO2-(aq) + H3O+(aq)  
B)   NO2-(aq) + H3O+(aq)    HNO2(aq) + H2O(   )  
C)   NO2-(aq) + H3O+(aq)    HNO2(aq)  
D)   H+(aq) + OH-(aq)    H2O(   )  
E)   HNO2(aq)    NO2-(aq) + H3O+(aq) " class="answers-bank-image d-inline" rel="preload" > NO2-(aq) + H3O+(aq) 
B)   NO2-(aq) + H3O+(aq)  2(aq) + H2O(   )    NO2-(aq) + H3O+(aq)  
B)   NO2-(aq) + H3O+(aq)    HNO2(aq) + H2O(   )  
C)   NO2-(aq) + H3O+(aq)    HNO2(aq)  
D)   H+(aq) + OH-(aq)    H2O(   )  
E)   HNO2(aq)    NO2-(aq) + H3O+(aq) " class="answers-bank-image d-inline" rel="preload" > HNO2(aq) + H2O( 2(aq) + H2O(   )    NO2-(aq) + H3O+(aq)  
B)   NO2-(aq) + H3O+(aq)    HNO2(aq) + H2O(   )  
C)   NO2-(aq) + H3O+(aq)    HNO2(aq)  
D)   H+(aq) + OH-(aq)    H2O(   )  
E)   HNO2(aq)    NO2-(aq) + H3O+(aq) " class="answers-bank-image d-inline" rel="preload" > ) 
C)   NO2-(aq) + H3O+(aq)  2(aq) + H2O(   )    NO2-(aq) + H3O+(aq)  
B)   NO2-(aq) + H3O+(aq)    HNO2(aq) + H2O(   )  
C)   NO2-(aq) + H3O+(aq)    HNO2(aq)  
D)   H+(aq) + OH-(aq)    H2O(   )  
E)   HNO2(aq)    NO2-(aq) + H3O+(aq) " class="answers-bank-image d-inline" rel="preload" > HNO2(aq) 
D)   H+(aq) + OH-(aq)  2(aq) + H2O(   )    NO2-(aq) + H3O+(aq)  
B)   NO2-(aq) + H3O+(aq)    HNO2(aq) + H2O(   )  
C)   NO2-(aq) + H3O+(aq)    HNO2(aq)  
D)   H+(aq) + OH-(aq)    H2O(   )  
E)   HNO2(aq)    NO2-(aq) + H3O+(aq) " class="answers-bank-image d-inline" rel="preload" > H2O( 2(aq) + H2O(   )    NO2-(aq) + H3O+(aq)  
B)   NO2-(aq) + H3O+(aq)    HNO2(aq) + H2O(   )  
C)   NO2-(aq) + H3O+(aq)    HNO2(aq)  
D)   H+(aq) + OH-(aq)    H2O(   )  
E)   HNO2(aq)    NO2-(aq) + H3O+(aq) " class="answers-bank-image d-inline" rel="preload" > ) 
E)   HNO2(aq)  2(aq) + H2O(   )    NO2-(aq) + H3O+(aq)  
B)   NO2-(aq) + H3O+(aq)    HNO2(aq) + H2O(   )  
C)   NO2-(aq) + H3O+(aq)    HNO2(aq)  
D)   H+(aq) + OH-(aq)    H2O(   )  
E)   HNO2(aq)    NO2-(aq) + H3O+(aq) " class="answers-bank-image d-inline" rel="preload" > NO2-(aq) + H3O+(aq)

Question 6

Which of the following expressions for K is correct for the reaction given below? Al3+(aq) + 4 OH-(aq)  3+(aq) + 4 OH-(aq)    Al(OH) 4-(aq)  A)    B)    C)    D)    E)   " class="answers-bank-image d-inline" rel="preload" > Al(OH) 4-(aq)

Accepted Answer

A)   3+(aq) + 4 OH-(aq)    Al(OH) 4-(aq)  
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
B)   3+(aq) + 4 OH-(aq)    Al(OH) 4-(aq)  
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
C)   3+(aq) + 4 OH-(aq)    Al(OH) 4-(aq)  
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
D)   3+(aq) + 4 OH-(aq)    Al(OH) 4-(aq)  
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   3+(aq) + 4 OH-(aq)    Al(OH) 4-(aq)  
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" > E

Question 7

When 1.0 mole of acetic acid is diluted with water to a volume of 1.0 L at 25 °C,0.42% of the acetic acid ionizes to form acetate ion and hydronium ion.
CH3CO2H(aq)+ H2O(  )  CH3CO2-(aq)+ H3O+(aq)
What percentage of the acid ionizes when 0.75 mole of acetic acid is diluted with water to 1.0 L at 25 °C?

Accepted Answer

Question 8

The equilibrium constant (Kc) for the decomposition of ammonium hydrogen sulfide,NH4HS(s)  c) for the decomposition of ammonium hydrogen sulfide,NH4HS(s)    NH3(g) + H2S(g) ,is 1.8 × 10-4 at 25 °C.If excess NH4HS(s) is allowed to equilibrate at 25 °C,what is the equilibrium concentration of NH3? A)  3.2 × 10-8 M B)  9.0 × 10-5 M C)  1.8 × 10-4 M D)  6.7 × 10-3 M E)  1.3 × 10-2 M" class="answers-bank-image d-inline" rel="preload" > NH3(g) + H2S(g) ,is 1.8 × 10-4 at 25 °C.If excess NH4HS(s) is allowed to equilibrate at 25 °C,what is the equilibrium concentration of NH3?

Accepted Answer

A)   3.2 × 10-8 M
B)   9.0 × 10-5 M
C)   1.8 × 10-4 M
D)   6.7 × 10-3 M
E)   1.3 × 10-2 M

Question 9

Which of the following is always true for a reaction where Kc is c is   at 25°C? A)  The reaction mixture contains mostly reactants at equilibrium. B)  The reaction mixture contains mostly products at equilibrium. C)  The rate of reaction is very slow. D)  There are approximately equal moles of reactants and products at equilibrium. E)  Both A and C." class="answers-bank-image d-inline" rel="preload" > at 25°C?

Accepted Answer

A)   The reaction mixture contains mostly reactants at equilibrium.
B)   The reaction mixture contains mostly products at equilibrium.
C)   The rate of reaction is very slow.
D)   There are approximately equal moles of reactants and products at equilibrium.
E)   Both A and C.

Question 10

What is the Kc equilibrium-constant expression for the following equilibrium? NiO(s) + H2(g)  c equilibrium-constant expression for the following equilibrium? NiO(s) + H2(g)    Ni(s) + H2O(g)  A)    B)  ​   C)  ​   D)  ​   E)  ​  " class="answers-bank-image d-inline" rel="preload" > Ni(s) + H2O(g)

Accepted Answer

A)   c equilibrium-constant expression for the following equilibrium? NiO(s) + H2(g)    Ni(s) + H2O(g)  
A)     
B)   ​   
C)   ​   
D)   ​   
E)   ​  " class="answers-bank-image d-inline" rel="preload" >
B)   ​ c equilibrium-constant expression for the following equilibrium? NiO(s) + H2(g)    Ni(s) + H2O(g)  
A)     
B)   ​   
C)   ​   
D)   ​   
E)   ​  " class="answers-bank-image d-inline" rel="preload" >
C)   ​ c equilibrium-constant expression for the following equilibrium? NiO(s) + H2(g)    Ni(s) + H2O(g)  
A)     
B)   ​   
C)   ​   
D)   ​   
E)   ​  " class="answers-bank-image d-inline" rel="preload" >
D)   ​ c equilibrium-constant expression for the following equilibrium? NiO(s) + H2(g)    Ni(s) + H2O(g)  
A)     
B)   ​   
C)   ​   
D)   ​   
E)   ​  " class="answers-bank-image d-inline" rel="preload" >
E)   ​ c equilibrium-constant expression for the following equilibrium? NiO(s) + H2(g)    Ni(s) + H2O(g)  
A)     
B)   ​   
C)   ​   
D)   ​   
E)   ​  " class="answers-bank-image d-inline" rel="preload" > A

Question 11

What is the expression for Kc for the following equilibrium? CaSO3(s)  c for the following equilibrium? CaSO3(s)    CaO(s) + SO2(g)  A)    B)  ​   C)  ​   D)  ​   E)  ​  " class="answers-bank-image d-inline" rel="preload" > CaO(s) + SO2(g)

Accepted Answer

A)   c for the following equilibrium? CaSO3(s)    CaO(s) + SO2(g)  
A)     
B)   ​   
C)   ​   
D)   ​   
E)   ​  " class="answers-bank-image d-inline" rel="preload" >
B)   ​ c for the following equilibrium? CaSO3(s)    CaO(s) + SO2(g)  
A)     
B)   ​   
C)   ​   
D)   ​   
E)   ​  " class="answers-bank-image d-inline" rel="preload" >
C)   ​ c for the following equilibrium? CaSO3(s)    CaO(s) + SO2(g)  
A)     
B)   ​   
C)   ​   
D)   ​   
E)   ​  " class="answers-bank-image d-inline" rel="preload" >
D)   ​ c for the following equilibrium? CaSO3(s)    CaO(s) + SO2(g)  
A)     
B)   ​   
C)   ​   
D)   ​   
E)   ​  " class="answers-bank-image d-inline" rel="preload" >
E)   ​ c for the following equilibrium? CaSO3(s)    CaO(s) + SO2(g)  
A)     
B)   ​   
C)   ​   
D)   ​   
E)   ​  " class="answers-bank-image d-inline" rel="preload" >

Question 12

At a given temperature,K = 0.024 for the equilibrium: PCl5(g)  5(g)    PCl3(g) + Cl2(g)  What is K for: Cl2(g) + PCl3(g)    PCl5(g) ? A)  1700 B)  24 C)  0.00058 D)  42 E)  0.024" class="answers-bank-image d-inline" rel="preload" > PCl3(g) + Cl2(g) 
What is K for:
Cl2(g) + PCl3(g)  5(g)    PCl3(g) + Cl2(g)  What is K for: Cl2(g) + PCl3(g)    PCl5(g) ? A)  1700 B)  24 C)  0.00058 D)  42 E)  0.024" class="answers-bank-image d-inline" rel="preload" > PCl5(g) ?

Accepted Answer

A)   1700
B)   24
C)   0.00058
D)   42
E)   0.024

Question 13

The reaction quotient,Q,for a system is  .If the equilibrium constant for the system at some temperature is  ,what will happen as the reaction mixture returns to equilibrium?

Accepted Answer

A)   The equilibrium constant will increase until it equals the reaction quotient.
B)   There will be a net loss in both product(s) and reactant(s) .
C)   There will be a net loss in product(s) .
D)   There will be a net loss in reactant(s) .
E)   The equilibrium constant will increase.

Question 14

Which of the following is the correct balanced equation for the equilibrium expression given below? 2(g) + O2(g)    2 SO3(g)  B)  2 SO3(g)    2 SO2(g) + O2(g)  C)  2 SO3(aq)    2 SO2(aq) + O2(aq)  D)  2 SO2(aq) + O2(aq)    2 SO3(aq)  E)  SO2(g) +   O2(g)    SO3(g) " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   2 SO2(g) + O2(g)  2(g) + O2(g)    2 SO3(g)  
B)   2 SO3(g)    2 SO2(g) + O2(g)  
C)   2 SO3(aq)    2 SO2(aq) + O2(aq)  
D)   2 SO2(aq) + O2(aq)    2 SO3(aq)  
E)   SO2(g) +   O2(g)    SO3(g) " class="answers-bank-image d-inline" rel="preload" > 2 SO3(g) 
B)   2 SO3(g)  2(g) + O2(g)    2 SO3(g)  
B)   2 SO3(g)    2 SO2(g) + O2(g)  
C)   2 SO3(aq)    2 SO2(aq) + O2(aq)  
D)   2 SO2(aq) + O2(aq)    2 SO3(aq)  
E)   SO2(g) +   O2(g)    SO3(g) " class="answers-bank-image d-inline" rel="preload" > 2 SO2(g) + O2(g) 
C)   2 SO3(aq)  2(g) + O2(g)    2 SO3(g)  
B)   2 SO3(g)    2 SO2(g) + O2(g)  
C)   2 SO3(aq)    2 SO2(aq) + O2(aq)  
D)   2 SO2(aq) + O2(aq)    2 SO3(aq)  
E)   SO2(g) +   O2(g)    SO3(g) " class="answers-bank-image d-inline" rel="preload" > 2 SO2(aq) + O2(aq) 
D)   2 SO2(aq) + O2(aq)  2(g) + O2(g)    2 SO3(g)  
B)   2 SO3(g)    2 SO2(g) + O2(g)  
C)   2 SO3(aq)    2 SO2(aq) + O2(aq)  
D)   2 SO2(aq) + O2(aq)    2 SO3(aq)  
E)   SO2(g) +   O2(g)    SO3(g) " class="answers-bank-image d-inline" rel="preload" > 2 SO3(aq) 
E)   SO2(g) + 2(g) + O2(g)    2 SO3(g)  
B)   2 SO3(g)    2 SO2(g) + O2(g)  
C)   2 SO3(aq)    2 SO2(aq) + O2(aq)  
D)   2 SO2(aq) + O2(aq)    2 SO3(aq)  
E)   SO2(g) +   O2(g)    SO3(g) " class="answers-bank-image d-inline" rel="preload" > O2(g)  2(g) + O2(g)    2 SO3(g)  
B)   2 SO3(g)    2 SO2(g) + O2(g)  
C)   2 SO3(aq)    2 SO2(aq) + O2(aq)  
D)   2 SO2(aq) + O2(aq)    2 SO3(aq)  
E)   SO2(g) +   O2(g)    SO3(g) " class="answers-bank-image d-inline" rel="preload" > SO3(g)

Question 15

For the reaction given below,2.00 moles of A and 3.00 moles of B are placed in a 6.00-L container. A(g) + 2B(g)  c? A)  1.20 B)  1.53 C)  5.22 D)  0.230 E)  0.449" class="answers-bank-image d-inline" rel="preload" > C(g) 
At equilibrium,the concentration of A is 0.230 mol/L.What is the value of Kc?

Accepted Answer

A)   1.20
B)   1.53
C)   5.22
D)   0.230
E)   0.449

Question 16

What is the reaction quotient,Q,for the equilibrium CuCl(s)  +(aq) + Cl−(aq)  When 0.3746 L of   M Cu+ is combined with 0.4326 L of   M Cl− in the presence of an excess of CuCl(s) ? A)    B)    C)    D)    E)   " class="answers-bank-image d-inline" rel="preload" > Cu+(aq) + Cl−(aq) 
When 0.3746 L of +(aq) + Cl−(aq)  When 0.3746 L of   M Cu+ is combined with 0.4326 L of   M Cl− in the presence of an excess of CuCl(s) ? A)    B)    C)    D)    E)   " class="answers-bank-image d-inline" rel="preload" > M Cu+ is combined with 0.4326 L of +(aq) + Cl−(aq)  When 0.3746 L of   M Cu+ is combined with 0.4326 L of   M Cl− in the presence of an excess of CuCl(s) ? A)    B)    C)    D)    E)   " class="answers-bank-image d-inline" rel="preload" > M Cl− in the presence of an excess of CuCl(s) ?

Accepted Answer

A)   +(aq) + Cl−(aq)  When 0.3746 L of   M Cu+ is combined with 0.4326 L of   M Cl− in the presence of an excess of CuCl(s) ? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
B)   +(aq) + Cl−(aq)  When 0.3746 L of   M Cu+ is combined with 0.4326 L of   M Cl− in the presence of an excess of CuCl(s) ? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
C)   +(aq) + Cl−(aq)  When 0.3746 L of   M Cu+ is combined with 0.4326 L of   M Cl− in the presence of an excess of CuCl(s) ? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
D)   +(aq) + Cl−(aq)  When 0.3746 L of   M Cu+ is combined with 0.4326 L of   M Cl− in the presence of an excess of CuCl(s) ? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   +(aq) + Cl−(aq)  When 0.3746 L of   M Cu+ is combined with 0.4326 L of   M Cl− in the presence of an excess of CuCl(s) ? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >

Question 17

In 1913,the Haber-Bosch process was patented.The product of the Haber-Bosch process is ________.

Accepted Answer

The answer of In 1913,the Haber-Bosch process was patented.The product...

Question 18

In which of the following reactions does a decrease in the volume of the reaction vessel at constant temperature favor the formation of the products?

Accepted Answer

A)   2 H2(g) + O2(g)  2(g) + O2(g)    2 H2O(g)  
B)   NO2(g) + CO(g)    NO(g) + CO2(g)  
C)   H2(g) + I2(g)    2 HI(g)  
D)   2 O3(g)    3 O2(g)  
E)   MgCO3(s)    MgO(s) + CO2(g) " class="answers-bank-image d-inline" rel="preload" > 2 H2O(g) 
B)   NO2(g) + CO(g)  2(g) + O2(g)    2 H2O(g)  
B)   NO2(g) + CO(g)    NO(g) + CO2(g)  
C)   H2(g) + I2(g)    2 HI(g)  
D)   2 O3(g)    3 O2(g)  
E)   MgCO3(s)    MgO(s) + CO2(g) " class="answers-bank-image d-inline" rel="preload" > NO(g) + CO2(g) 
C)   H2(g) + I2(g)  2(g) + O2(g)    2 H2O(g)  
B)   NO2(g) + CO(g)    NO(g) + CO2(g)  
C)   H2(g) + I2(g)    2 HI(g)  
D)   2 O3(g)    3 O2(g)  
E)   MgCO3(s)    MgO(s) + CO2(g) " class="answers-bank-image d-inline" rel="preload" > 2 HI(g) 
D)   2 O3(g)  2(g) + O2(g)    2 H2O(g)  
B)   NO2(g) + CO(g)    NO(g) + CO2(g)  
C)   H2(g) + I2(g)    2 HI(g)  
D)   2 O3(g)    3 O2(g)  
E)   MgCO3(s)    MgO(s) + CO2(g) " class="answers-bank-image d-inline" rel="preload" > 3 O2(g) 
E)   MgCO3(s)  2(g) + O2(g)    2 H2O(g)  
B)   NO2(g) + CO(g)    NO(g) + CO2(g)  
C)   H2(g) + I2(g)    2 HI(g)  
D)   2 O3(g)    3 O2(g)  
E)   MgCO3(s)    MgO(s) + CO2(g) " class="answers-bank-image d-inline" rel="preload" > MgO(s) + CO2(g)

Question 19

Consider the reaction A(aq)  c = 4.1 at 25 °C.If 0.50 M A(aq) and 1.5 M B(aq) are initially present in a 1.0 L flask at 25 °C,what change in concentrations (if any) will occur in time? A)  [A] will decrease and [B] will decrease. B)  [A] will decrease and [B] will increase. C)  [A] will increase and [B] will decrease. D)  [A] will increase and [B] will increase. E)  [A] and [B] remain unchanged." class="answers-bank-image d-inline" rel="preload" > 2 B(aq) where Kc = 4.1 at 25 °C.If 0.50 M A(aq) and 1.5 M B(aq) are initially present in a 1.0 L flask at 25 °C,what change in concentrations (if any) will occur in time?

Accepted Answer

A)   [A] will decrease and [B] will decrease.
B)   [A] will decrease and [B] will increase.
C)   [A] will increase and [B] will decrease.
D)   [A] will increase and [B] will increase.
E)   [A] and [B] remain unchanged.

Question 20

For the equilibrium PCl5(g)  5(g)    PCl3(g) + Cl2(g) ,Kc = 4.0 at 228°C.If pure PCl5 is placed in a 1.00-L container and allowed to come to equilibrium,and the equilibrium concentration of PCl5(g) is 0.19 M,what is the equilibrium concentration of PCl3? A)  0.095 M B)  0.4 M C)  0.19 M D)  0.87 M E)  0.009 M" class="answers-bank-image d-inline" rel="preload" > PCl3(g) + Cl2(g) ,Kc = 4.0 at 228°C.If pure PCl5 is placed in a 1.00-L container and allowed to come to equilibrium,and the equilibrium concentration of PCl5(g) is 0.19 M,what is the equilibrium concentration of PCl3?

Accepted Answer

A)   0.095 M
B)   0.4 M
C)   0.19 M
D)   0.87 M
E)   0.009 M

Exam 16: Principles of Chemical Reactivity: Equilibria

At a given temperature,0.0664 mol N₂O₄(g) is placed in a 1.00 L flask.After reaching equilibrium,the concentration of NO₂(g) is 6.1 × 10^-3 M.What is K_c for the reaction below? N₂O₄(g) 2 NO₂(g)

Correct Answer
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Correct Answer
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Given the equilibrium constants for the following reactions: 4Cu(s) + O₂(g) 2Cu₂O(s) ,K₁4CuO(s) 2Cu₂O(s) + O₂(g) ,K₂ What is K for the system 2Cu(s) + O₂(g) 2CuO(s) Equivalent to?

Correct Answer
verified
A

If the reaction quotient,Q,is equal to K in a gas phase reaction,then

Correct Answer
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Write a balanced chemical equation which corresponds to the following equilibrium constant expression.

Correct Answer
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Which of the following expressions for K is correct for the reaction given below? Al³⁺(aq) + 4 OH^-(aq) Al(OH) ₄^-(aq)

Correct Answer
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E

Correct Answer
verified

The equilibrium constant (K_c) for the decomposition of ammonium hydrogen sulfide,NH₄HS(s) NH₃(g) + H₂S(g) ,is 1.8 × 10^-4 at 25 °C.If excess NH₄HS(s) is allowed to equilibrate at 25 °C,what is the equilibrium concentration of NH₃?

Correct Answer
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Which of the following is always true for a reaction where K_c is at 25°C?

Correct Answer
verified

What is the K_c equilibrium-constant expression for the following equilibrium? NiO(s) + H₂(g) Ni(s) + H₂O(g)

Correct Answer
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A

What is the expression for K_c for the following equilibrium? CaSO₃(s) CaO(s) + SO₂(g)

Correct Answer
verified

At a given temperature,K = 0.024 for the equilibrium: PCl₅(g) PCl₃(g) + Cl₂(g) What is K for: Cl₂(g) + PCl₃(g) PCl₅(g) ?

Correct Answer
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The reaction quotient,Q,for a system is .If the equilibrium constant for the system at some temperature is ,what will happen as the reaction mixture returns to equilibrium?

Correct Answer
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Which of the following is the correct balanced equation for the equilibrium expression given below?

Correct Answer
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For the reaction given below,2.00 moles of A and 3.00 moles of B are placed in a 6.00-L container. A(g) + 2B(g) C(g) At equilibrium,the concentration of A is 0.230 mol/L.What is the value of K_c?

Correct Answer
verified

What is the reaction quotient,Q,for the equilibrium CuCl(s) Cu⁺(aq) + Cl−(aq) When 0.3746 L of M Cu⁺ is combined with 0.4326 L of M Cl− in the presence of an excess of CuCl(s) ?

Correct Answer
verified

In 1913,the Haber-Bosch process was patented.The product of the Haber-Bosch process is ________.

Correct Answer
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In which of the following reactions does a decrease in the volume of the reaction vessel at constant temperature favor the formation of the products?

Correct Answer
verified

Consider the reaction A(aq) 2 B(aq) where K_c = 4.1 at 25 °C.If 0.50 M A(aq) and 1.5 M B(aq) are initially present in a 1.0 L flask at 25 °C,what change in concentrations (if any) will occur in time?

Correct Answer
verified

For the equilibrium PCl₅(g) PCl₃(g) + Cl₂(g) ,K_c = 4.0 at 228°C.If pure PCl₅ is placed in a 1.00-L container and allowed to come to equilibrium,and the equilibrium concentration of PCl₅(g) is 0.19 M,what is the equilibrium concentration of PCl₃?

Correct Answer
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Exam 16: Principles of Chemical Reactivity: Equilibria

At a given temperature,0.0664 mol N2O4(g) is placed in a 1.00 L flask.After reaching equilibrium,the concentration of NO2(g) is 6.1 × 10-3 M.What is Kc for the reaction below? N2O4(g) 2 NO2(g)

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Given the equilibrium constants for the following reactions: 4Cu(s) + O2(g) 2Cu2O(s) ,K1 4CuO(s) 2Cu2O(s) + O2(g) ,K2 What is K for the system 2Cu(s) + O2(g) 2CuO(s) Equivalent to?

Correct AnswerverifiedA

If the reaction quotient,Q,is equal to K in a gas phase reaction,then

Correct AnswerverifiedShow Answer

Write a balanced chemical equation which corresponds to the following equilibrium constant expression.

Correct AnswerverifiedShow Answer

Which of the following expressions for K is correct for the reaction given below? Al3+(aq) + 4 OH-(aq) Al(OH) 4-(aq)

Correct AnswerverifiedE

Correct AnswerverifiedShow Answer

The equilibrium constant (Kc) for the decomposition of ammonium hydrogen sulfide,NH4HS(s) NH3(g) + H2S(g) ,is 1.8 × 10-4 at 25 °C.If excess NH4HS(s) is allowed to equilibrate at 25 °C,what is the equilibrium concentration of NH3?

Correct AnswerverifiedShow Answer

Which of the following is always true for a reaction where Kc is at 25°C?

Correct AnswerverifiedShow Answer

What is the Kc equilibrium-constant expression for the following equilibrium? NiO(s) + H2(g) Ni(s) + H2O(g)

Correct AnswerverifiedA

What is the expression for Kc for the following equilibrium? CaSO3(s) CaO(s) + SO2(g)

Correct AnswerverifiedShow Answer

At a given temperature,K = 0.024 for the equilibrium: PCl5(g) PCl3(g) + Cl2(g) What is K for: Cl2(g) + PCl3(g) PCl5(g) ?

Correct AnswerverifiedShow Answer

The reaction quotient,Q,for a system is .If the equilibrium constant for the system at some temperature is ,what will happen as the reaction mixture returns to equilibrium?

Correct AnswerverifiedShow Answer

Which of the following is the correct balanced equation for the equilibrium expression given below?

Correct AnswerverifiedShow Answer

For the reaction given below,2.00 moles of A and 3.00 moles of B are placed in a 6.00-L container. A(g) + 2B(g) C(g) At equilibrium,the concentration of A is 0.230 mol/L.What is the value of Kc?

Correct AnswerverifiedShow Answer

What is the reaction quotient,Q,for the equilibrium CuCl(s) Cu+(aq) + Cl−(aq) When 0.3746 L of M Cu+ is combined with 0.4326 L of M Cl− in the presence of an excess of CuCl(s) ?

Correct AnswerverifiedShow Answer

In 1913,the Haber-Bosch process was patented.The product of the Haber-Bosch process is ________.

Correct AnswerverifiedShow Answer

In which of the following reactions does a decrease in the volume of the reaction vessel at constant temperature favor the formation of the products?

Correct AnswerverifiedShow Answer

Consider the reaction A(aq) 2 B(aq) where Kc = 4.1 at 25 °C.If 0.50 M A(aq) and 1.5 M B(aq) are initially present in a 1.0 L flask at 25 °C,what change in concentrations (if any) will occur in time?

Correct AnswerverifiedShow Answer

For the equilibrium PCl5(g) PCl3(g) + Cl2(g) ,Kc = 4.0 at 228°C.If pure PCl5 is placed in a 1.00-L container and allowed to come to equilibrium,and the equilibrium concentration of PCl5(g) is 0.19 M,what is the equilibrium concentration of PCl3?

Correct AnswerverifiedShow Answer

At a given temperature,0.0664 mol N₂O₄(g) is placed in a 1.00 L flask.After reaching equilibrium,the concentration of NO₂(g) is 6.1 × 10^-3 M.What is K_c for the reaction below? N₂O₄(g) 2 NO₂(g)

Correct Answer
verified

Correct Answer
verified

Given the equilibrium constants for the following reactions: 4Cu(s) + O₂(g) 2Cu₂O(s) ,K₁4CuO(s) 2Cu₂O(s) + O₂(g) ,K₂ What is K for the system 2Cu(s) + O₂(g) 2CuO(s) Equivalent to?

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified

Which of the following expressions for K is correct for the reaction given below? Al³⁺(aq) + 4 OH^-(aq) Al(OH) ₄^-(aq)

Correct Answer
verified
E

Correct Answer
verified

The equilibrium constant (K_c) for the decomposition of ammonium hydrogen sulfide,NH₄HS(s) NH₃(g) + H₂S(g) ,is 1.8 × 10^-4 at 25 °C.If excess NH₄HS(s) is allowed to equilibrate at 25 °C,what is the equilibrium concentration of NH₃?

Correct Answer
verified

Which of the following is always true for a reaction where K_c is at 25°C?

Correct Answer
verified

What is the K_c equilibrium-constant expression for the following equilibrium? NiO(s) + H₂(g) Ni(s) + H₂O(g)

Correct Answer
verified
A

What is the expression for K_c for the following equilibrium? CaSO₃(s) CaO(s) + SO₂(g)

Correct Answer
verified

At a given temperature,K = 0.024 for the equilibrium: PCl₅(g) PCl₃(g) + Cl₂(g) What is K for: Cl₂(g) + PCl₃(g) PCl₅(g) ?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

For the reaction given below,2.00 moles of A and 3.00 moles of B are placed in a 6.00-L container. A(g) + 2B(g) C(g) At equilibrium,the concentration of A is 0.230 mol/L.What is the value of K_c?

Correct Answer
verified

What is the reaction quotient,Q,for the equilibrium CuCl(s) Cu⁺(aq) + Cl−(aq) When 0.3746 L of M Cu⁺ is combined with 0.4326 L of M Cl− in the presence of an excess of CuCl(s) ?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Consider the reaction A(aq) 2 B(aq) where K_c = 4.1 at 25 °C.If 0.50 M A(aq) and 1.5 M B(aq) are initially present in a 1.0 L flask at 25 °C,what change in concentrations (if any) will occur in time?

Correct Answer
verified

For the equilibrium PCl₅(g) PCl₃(g) + Cl₂(g) ,K_c = 4.0 at 228°C.If pure PCl₅ is placed in a 1.00-L container and allowed to come to equilibrium,and the equilibrium concentration of PCl₅(g) is 0.19 M,what is the equilibrium concentration of PCl₃?

Correct Answer
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