Last modified: Tue 01/05/2016 03:16:59 pm
<div align="center"> <h3> ACA</h3> </div>

Oklahoma State University

It is OK to use your textbook or lecture notes from class, but if you can answers the questions without it that is OK too.

Do not press the RETURN or ENTER key while you are answering these questions. Your browser will interpret either the same as clicking on the Submit key.

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:

School:

Open the link to the simulation for the first part of this ACA. The simulation will open in a new window. There are three tabs near the top of the window: Overview; Learner Outcomes; and Experiment. Review the Overview tab and the LEarner Outcomes tab, and then click on the Experiment tab. In the new screen there are three buttons. Two are for Demo modes and the third is 'Run Experiment'. You are welcome to run the Demos, however the instructions below are for 'Run Experiment' mode. ATTENTION: Be sure to read the instructions as they will guide.

Use the following steps in 'Run Experiment'.

1. Select a reaction:

Click in the 'Choose two gases to react' dropdown menu. You are welcome to explore any reaction, but you could try methane and oxygen.

2. Balance the equation:

Enter the coefficients (enter 1 where needed) to balance the equation then click on the Check Balance button.

3. On the right side of the screen showing the ICF table in the lower right corner is a button that reads Moles. Click on it and select Moles and Grams

4. In the Initial Row, or above the gas tanks add 20.0 grams of oxygen, O2, and 10.0 grams of methane, CH4 in the cells identified as grams (watch the tank values open to add the gases to the reaction container.). The initial amounts of the products have already been entered.

5. You will next be asked to enter amounts for the change for the reactants and the products. You may do that in units of Moles or Grams. If you choose to enter Change amounts in Moles, Grams will be calculated for you when you click out of the cell. When you have entered values for all substances click on the Change button to see if the amounts you have entered are acceptable. You can correct any errors in entry.

6. Once all of the Change amounts are correct you can click on the React button to see a short animations of the reaction.

5. You will next enter the Final/Ending amounts. Once all values are entered click the Final button to check your entries. You will be able to correct any errors of entry.

Refer to the simulation, to complete the following reaction table.

Table I: Use units of moles

 
REACTANTS
REACTANTS
PRODUCTS
PRODUCTS
Exp.
CH4
2O2
--->
CO2
2H2O
Initial Amount
Change Amount
Final Amount
 

Table II: Use units of grams

 
REACTANTS
REACTANTS
PRODUCTS
PRODUCTS
Exp.
CH4
2O2
--->
CO2
2H2O
Initial Amount
Change Amount
Final Amount
 

 

In your experiment who is the limiting reagent and who is the reagent in excess?

limiting reagent reagent in excess

For the final question on this ACA open the new simulation (if the applet does not work checkout the QTmovie). The simulation will open in a new window. Resize the window so you can interact with the simulation and see the ACA window.

Click the Resume button and the Enable Reaction button and observe what happens. Try some different initial amounts of the reactants. To try a different experiment click the reset button and then adjust the initial amounts of the reactants using the slidebar, or by selecting the amount and typing in a new amount. After performing a few experiments answer the following question.

What is the balanced chemical equation for this reaction? Use G for green atoms and B for blue atoms. Write the equation something like 2WZ + Y3Z --> W2Z + Y3X2


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

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