Thursday, July 26, 2012

Activity #8

Activity 8: Exploration of Chemistry

For activity 8, students have a choice to explore other topics of chemistry presented in the PhET simulations.
Tasks to be completed:

1. Choose any Teaching Idea from any of the Chemistry Simulations ( ) and post your results/data and/or answers on your blog.

I choose the "Balancing Chemical Equations" stimulation. It was a nice and easy way to learn how to balance simple chemical equations. The worksheet below was on posted on the website ent for students who use the "Balancing Chemical Equations" stimulation. It was a nice refresher coarse for me to learn how .

            Balancing a Chemical Equation Pre-lab                 Name: _Taryn McKeeth
1.   Aria wanted to design a new bouncy-chew toy for his new puppy.
She used this “equation” to build it.  The arrow                shows what she had “before” and “after” building her new toys.

a)    Did Aria balance her equation?            Yes             no              not sure

b)    Not so fast…Explain your answer to number 1!   

I chose ___yes______ because  there are the same number of red circles and white circles on each side.

c)    The “before” objects are called reactants.  Go back to the picture of the equation and circle all of the reactants, put (R) in the circle(s).


The “after” objects are called products.  Go back to the picture of the equation and put

 a            box around all products Put a (P) in the box(es).

2.   In the following chemical equation:               CO2 + H2O---------> C2H6 + O2 
a)    List the products:  Carbon, Oxygen, Hydrogen.

b)    Is this chemical equation balanced?
Ø  Yes, because ________________________________________
Ø  No, because There are 2H on one side and 6H on the other. There is 3 O’s on the one side and 2 O’s on the other side. There are one C on the one side and 2 C’s on the other.

2. Work with any of the Chemistry Simulations to create your own Teaching Idea. The criteria for this is as follows:
a. must identify and meet three (3) science education standards
b. must be original work
c. must be scientifically accurate and appropriate for the directed grade level.

Name: _______________  Balancing Equations                9th Grade Chemistry

In this worksheet we will be working on balancing equations.  Play the balancing game on the "Balancing Chemical Equations" stimulation for 20 minutes then complete the work sheet. Try to think of some chemical equations you would like to balance for the next time we meet.

  • Balance a chemical equation.
  • Recognize that the number of atoms of each element is conserved in a chemical reaction.
  • Describe the difference between coefficients and subscripts in a chemical equation.
  • Translate from symbolic to molecular representations of matter. 

1. What is an Atom?

2. What is a Molecule?

3. Why must equations be balanced? 

4. What are the symbols for:

5. Draw a Picture of a sulfate molecule.
    Then separate it and balance it out similar to how you did it in the simulation.

6. Based off of the simulation if you have 4 hydrogen atoms and 2 oxygen atoms how many molecules of Water can you make? Does the product of the equation above cause a change its physical state?

7. If you have 2 Ammonia molecules how many Nitrogen atoms and Hydrogen atoms will you have.

8. Which one of these equations is balanced?
A. 2H2 + O2 ------> 2H2O
B. O2 + NO -------> NO2
C. 2Mg + O2 -----> 2MgO

9. Circle the errors in this equation, then write it correctly below.    CH4 + O2 -----> CO2 + 2H2O

10. List 5 things you learned about balancing equations:

3 Science Standards:
D.12.1 Describe* atomic structure and the properties of atoms, molecules, and matter during physical and chemical interactions*

D.12.4 Explain* how substances, both simple and complex, interact* with one another to produce new substances

D.12.5 Identify* patterns in chemical and physical properties and use them to predict* likely chemical and physical changes and interactions