Equilibrium Constant Expression

The Equilibrium Constant Expression Concept Builder is comprised of 24 questions. The questions are divided into 12 different Question Groups and spread across three difficulty levels. Questions in the same group are rather similar to one another. The Concept Builder is coded to select at random a question from each group until a student is successful with that group of questions.

There are three difficulty levels that can be engaged in through the Concept Builder. Those three difficulty levels are differentiated as follows:
 
  • Apprentice Difficulty Level: Question Groups 1-4 ... Each question includes a chemical equation. Learners must identify the correct equilibirum constant expression from the five to eight possible answer options.
  • Master Difficulty Level: Question Groups 1-8 ... Each question includes a chemical equation. Learners must identify the correct equilibirum constant expression from the five to eight possible answer options. Four of the Question Groups are the same four Question Groups from the Apprentice Difficulty Level.
  • Wizard Difficulty Level: Question Groups 5-12 ... Each question includes a chemical equation. Learners must identify the correct equilibirum constant expression from the five to eight possible answer options. Four of the Question Groups are from the Master Difficulty Level.

The questions from each group are shown below. Teachers are encouraged to view the questions in order to judge which difficulty levels are most appropriate for their classes. We recommend providing students two or more options. 

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Equilibrium Constant Expression

 
 
Apprentice Difficulty Level:  Question Groups 1-4
Master Difficulty Level:  Question Groups 1-8
Wizard Difficulty Level:  Question Groups 5-12
 
 
Question Group 1
Question 1
Identify the equlibirum constant equation that is consistent with the given reaction.
 

N2(g)    +    O2(g)         <==>     2 NO (g)

 
 
Question 2
Identify the equlibirum constant equation that is consistent with the given reaction.
 

2 HI (g)    <==>        H2 (g)       +      I2 (s)

 
 
 
Question Group 2
Question 3
Identify the equlibirum constant equation that is consistent with the given reaction.
 

Ba(OH)2 (s)     <==>       Ba2+ (aq)   +    2 OH(aq)

 
 
Question 4
Identify the equlibirum constant equation that is consistent with the given reaction.
 

Ca(OH)2 (s)     <==>      Ca2+ (aq)   +    2 OH(aq)

 
 
 
Question Group 3
Question 5
Identify the equlibirum constant equation that is consistent with the given reaction.
 

2 H2(g)    <==>     2 H2(g)    +   S2(g)

 
 
Question 6
Identify the equlibirum constant equation that is consistent with the given reaction.
 

2 SO2(g)+ O2(g)    <==>     2 SO(g)

 
 
 
Question Group 4
Question 7
Identify the equlibirum constant equation that is consistent with the given reaction.
 

HF (aq)   +   H2(l)       <==>     H3O(aq)   +    F-(aq)

 
 
Question 8
Identify the equlibirum constant equation that is consistent with the given reaction.
 

2 H2(l)     <==>     2 H2(g)    +   O2(g)

 
 
 
Question Group 5
Question 9
Identify the equlibirum constant equation that is consistent with the given reaction.
 

2 C (s)    +   O2(g)          <==>      2 CO (g)

 
 
Question 10
Identify the equlibirum constant equation that is consistent with the given reaction.
 

(s)    +    CO2 (g)    <==>     2 CO (g)

 
 
 
Question Group 6
Question 11
Identify the equlibirum constant equation that is consistent with the given reaction.
 

2 HgO (s)    <==>     2 Hg (l)    +    O2(g)

 
 
Question 12
Identify the equlibirum constant equation that is consistent with the given reaction.
 

2 ICl (g)     <==>     I2 (s)    +    Cl2 (g)

 
 
 
Question Group 7
Question 13
Identify the equlibirum constant equation that is consistent with the given reaction.
 

CO (g)    +    3 H2(g)    <==>    CH4(g)    +    H2O(g)

 
 
Question 14
Identify the equlibirum constant equation that is consistent with the given reaction.
 

CO (g)    +   3 H2(g)   <==>     CH4(g)    +   H2(l)

 
 
Question Group 8
Question 15
Identify the equlibirum constant equation that is consistent with the given reaction.
 

Ca3(PO4)2(s)        <==>        3 Ca2+ (aq)   +    2 PO43-(aq)

 
 
Question 16
Identify the equlibirum constant equation that is consistent with the given reaction.
 

Al2(SO4)3(s)     <==>        2 Al3+ (aq)  +    3 SO42-(aq)

 
 
Question Group 9
Question 17
Identify the equlibirum constant equation that is consistent with the given reaction.
 

Cl2(g)    +   2 Br(aq)     <==>       Br2(l)    +   2 Cl(aq)  

 
 
Question 18
Identify the equlibirum constant equation that is consistent with the given reaction.
 

2 H2(g)    +     3 O2(g)   <==>    2 SO2(g)    +     2 H2(l)

 
 
Question Group 10
Question 19
Identify the equlibirum constant equation that is consistent with the given reaction.
 

4 NH3(g)    +    5 O2(g)    <==>       4 NO (g)    +    6 H2O(g)

 
 
Question 20
Identify the equlibirum constant equation that is consistent with the given reaction.
 

4 NH3 (g)    +     3 O2 (g)     <==>     2 N2 (g)     +     6 H2(g)

 
 
Question Group 11
Question 21
Identify the equlibirum constant equation that is consistent with the given reaction.
 

N2 (g)      +     3 H2 (g)     <==>      2 NH3 (g)

 
 
Question 22
Identify the equlibirum constant equation that is consistent with the given reaction.
 

2 NH3 (g)     <==>      N2 (g)      +      3 H2 (g)

 
 
 
Question Group 12
Question 23
Identify the equlibirum constant equation that is consistent with the given reaction.
 

3 O2 (g)     <==>      2 O3 (g)

 
 
Question 24
Identify the equlibirum constant equation that is consistent with the given reaction.
 

2 SO2(g)      +      O(g)      <==>     2 SO(g) 

 
 
 
 
 
 

 

 



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