Equilibrium Calculations - Questions

The Equilibrium Calculations Concept Builder is comprised of 18 questions. The questions are divided into three different difficulty levels. The Questions involve tables of numerical data associated with a reversible reaction. There are 5 missing table cells - one per row - in each difficulty level. The Concept Builder selects at random one of the tables for each difficulty level. Students must use the equlibrium constant expression for the provided reaction to determine the numerical values for the missing table cells. The number of misses are tracked and used to determine a Health Percentage. The Health Percentage is reported once the Table is complete. Students have the option of repeating the Difficulty Level in order to improve their Health Percentage.

The 18 different tables and accompanying reation are shown below. Teachers are encouraged to view the tables in order to judge which level(s) of difficulty is(are) most appropriate for their classes. 

The Physics Classroom grants teachers and other users the right to print these questions for private use. Users are also granted the right to copy the text and modify it for their own use. However, this document should not be uploaded to other servers for distribution to and/or display by others. The Physics Classroom website should remain the only website or server from which the document is distributed or displayed. We also provide a PDF that teachers can use under the same conditions. We have included a link to the PDF near the bottom of this page.

 


Equilibrium Calculations


 
Apprentice Difficulty Level
Question 1
Consider the reversible system:   CO(g)  +   Cl2(g)   ⇄     COCl2(g)
 
Several trials are run at diffferent temperatures. Results are shown. Concentrations are equilibrium concentrations. Determine the missing value in each row.
 
 
 
Question 2
Consider the reversible system:   CO(g)  +   Cl2(g)    ⇄     COCl2(g)
 
Several trials are run at diffferent temperatures. Results are shown in the table. Concentrations are equilibrium concentrations. Determine the missing value in each row.
 

 
Question 3
Consider the reversible system:   CO(g)  +   Cl2(g)  ⇄     COCl2(g)
 
Several trials are run at diffferent temperatures. Results are shown in the table. Concentrations are equilibrium concentrations. Determine the missing value in each row.
 
 
Question 4
Consider the reversible system:   Cl2(g)  +  NCl3(g)    ⇄     NCl5(g)
 
Several trials are run at diffferent temperatures. Results are shown in the table. Concentrations are equilibrium concentrations. Determine the missing value in each row.
 

 
 
Question 5
Consider the reversible system:   Cl2(g)  +  NCl3(g)     ⇄      NCl5(g)
 
Several trials are run at diffferent temperatures. Results are shown in the table. Concentrations are equilibrium concentrations. Determine the missing value in each row.
 
 
 
Question 6
Consider the reversible system:   Cl2(g)  +  NCl3(g)    ⇄       NCl5(g)
 
Several trials are run at diffferent temperatures. Results are shown in the table. Concentrations are equilibrium concentrations. Determine the missing value in each row.
 
 

 
Master Difficulty Level
Question 7
Consider the reversible system:   2 SO2(g)     +    O2(g)    ⇄        2 SO3(g)
 
Several trials are run at diffferent temperatures. Results are shown in the table. Concentrations are equilibrium concentrations. Determine the missing value in each row.
 
 
 
 
Question 8
Consider the reversible system:   2 SO2(g)     +    O2(g)    ⇄      2 SO3(g)
 
Several trials are run at diffferent temperatures. Results are shown in the table. Concentrations are equilibrium concentrations. Determine the missing value in each row.
 
 

 
Question 9
Consider the reversible system:   2 SO2(g)     +    O2(g)     ⇄      2 SO3(g)
 
Several trials are run at diffferent temperatures. Results are shown in the table. Concentrations are equilibrium concentrations. Determine the missing value in each row.
 
 
 
 
Question 10
Consider the reversible system:   2 NO(g)     +    O2(g)     ⇄       2 NO2(g)
 
Several trials are run at diffferent temperatures. Results are shown in the table. Concentrations are equilibrium concentrations. Determine the missing value in each row.
 
 

 
Question 11
Consider the reversible system:   2 NO(g)     +    O2(g)     ⇄      2 NO2(g)
 
Several trials are run at diffferent temperatures. Results are shown in the table. Concentrations are equilibrium concentrations. Determine the missing value in each row.
 
 
 
 
Question 12
Consider the reversible system:   2 NO(g)     +    O2(g)     ⇄      2 NO2(g)
 
Several trials are run at diffferent temperatures. Results are shown in the table. Concentrations are equilibrium concentrations. Determine the missing value in each row.
 

 
Wizard Difficulty Level
Question 13
Consider the reversible system:    N2(g)     +    3 H2(g)     ⇄      2 NH3(g)
 
Several trials are run at diffferent temperatures. Results are shown in the table. Concentrations are equilibrium concentrations. Determine the missing value in each row.
 
 
 
Question 14
Consider the reversible system:    N2(g)     +    3 H2(g)     ⇄       2 NH3(g)
 
Several trials are run at diffferent temperatures. Results are shown in the table. Concentrations are equilibrium concentrations. Determine the missing value in each row.
 

 
Question 15
Consider the reversible system:    N2(g)     +    3 H2(g)     ⇄      2 NH3(g)
 
Several trials are run at diffferent temperatures. Results are shown in the table. Concentrations are equilibrium concentrations. Determine the missing value in each row.
 
 
 
 
Question 16
Consider the reversible system:    N2(g)     +    3 H2(g)     ⇄      2 NH3(g)
 
Several trials are run at diffferent temperatures. Results are shown in the table. Concentrations are equilibrium concentrations. Determine the missing value in each row.
 
 

 
Question 17
Consider the reversible system:    N2(g)     +    3 H2(g)     ⇄      2 NH3(g)
 
Several trials are run at diffferent temperatures. Results are shown in the table. Concentrations are equilibrium concentrations. Determine the missing value in each row.
 
 
 
 
 
Question 18
Consider the reversible system:    N2(g)     +    3 H2(g)     ⇄      2 NH3(g)
 
Several trials are run at diffferent temperatures. Results are shown in the table. Concentrations are equilibrium concentrations. Determine the missing value in each row.