Last modified: Sun 10/06/2013 09:39:01 am
ACA

Oklahoma State University

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Answer all of the questions below. If you do not know an answer enter CNA. However, it will help me the most if you answer each question with your best intuition/idea about what would be a reasonable answer.


First Name:

Last Name:

Laboratory Section:

We have been studying the reaction R + GB RG + B in the last two classes. Lets look at this reaction further.

1. The initial and final conditions for the first experiment we performed in class using the above reaction are shown in the table below. (Note: the volume of the reaction is 1 L and the amounts are in mol.)

  R + BG RG + B

Initial Amount

2.0

2.0

 

0

0

Change

 

Ending Amount

0.638

0.638

 

1.362

1.362

Complete the Change row by entering the amounts for each reactant and product.

Explain each of the following:

a) Why is there a negative sign for the change for each reactant and a positive sign for the change for each product?

b) Putting aside the sign, why is the amount of change the same for each reactant and product in this reaction?

2. Using the same reaction and the information shown in the table below answer the following questions: (Note: the volume of the reaction is 1 L and the amounts are in mol.)

  R + BG RG + B

Initial Amount

1.4

1.8

 

0

0

Change

 

 

 

 

 

Ending Amount

0.337

 

 

 

 

a) Calculate how much R reacted.

mol

b) Based on your answer in a) how many mol of BG must react?

mol

c) Based on the initial amount of BG and the amount reacted, how many mol of BG are present at the end of the reaction?

mol

d) How many mol of RG and B are present at the end of the reaction?

mol RG

mol B

3. A 1.00 liter container initially holds 0.01000 mol of CO and 0.0010000 mol O2 at 2000 C. The reaction is allowed to proceed to equilibrium. At equilibrium the final amount of O2 is 0.00088 mol. Answer the following questions:

 
2CO
+ O2
2CO2

Initial amount

0.01000

0.001000

0

Change

 

 

 

Ending amount

 

0.00088

 

a) how many mol of O2 reacted?

mol

b) How many mol of CO and CO2 are present at equilibrium?

mol CO

mol CO2

c) calculate the equilibrium constant for the reaction.

K =

4. Is there anything about the questions that you feel you do not understand? List your concerns/questions.

5. If there is one question you would like to have answered in lecture, what would that question be?