Review Worksheet for balancing equations            Name __________________

 

Directions:  

1. Start Internet Explorer and go to Review Chembalancer.

2. Click ‘Directions’.  Read and understand the directions.

3. Click ‘OK’.

4. Click on ‘Start Game’

5. Try entering some numbers in the text boxes in front of each molecule.  What happens?

6. If you forget the directions, click on the ‘How to Play the Game’ link.  Click ‘OK’ when you finish reading them to return to the game.

7. When you think you have typed the right numbers in all the boxes, click the ‘Balanced’ button.

8. If you didn’t get it right, try again.

9. If you did get it right, then fill in the correct answers on this worksheet for #1.

10. Repeat steps 7-9 for the other 9 questions. 

11. Now do the two problems on the back of this worksheet.  You can draw the molecules just like the program did to figure out the answer.

 

Questions

Fill in the blanks below as you go though the game.  This is so I have a record that you did your assignment.

 

1.   _____ S  +  _____ O2 -->  _____ SO2

 

2.  _____ Na   +  _____ O2  -->  _____ Na2O2

 

3. _____ Hg  +  _____ O2  -->   _____  HgO

 

4. _____ Ag2O  -->  _____  Ag   + _____ O2

 

5. _____ Ba(OH)2 +  _____ H3PO4  -->   _____  BaHPO4  + _____ H2O

 

6. _____ NaOH  +  _____  H3PO4  -->  _____  Na2HPO4  +   _____ H2O

 

7.  _____  C4H8  +  _____  O2  -->   _____ CO2  +  H2O

 

8.  _____  C3H8  +  _____  O2  -->   _____ CO2  +  H2O

 

9. _____  Fe  +   _____  Cl2  -->   _____  FeCl3

 

10.   _____  Al  +   _____  HCl  -->   _____ AlCl3  +  _____  H2

 

 

 

 

 

Draw the molecules just like the program did to figure out the answer to #11 and #12.

 

11.  _____  HgO  -->   _____  Hg +   _____  O2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fact for #11: Mercuric oxide, HgO, is used to make the cathode of dry cell batteries.

 

 

12.  _____  NCl3  +  _____  H2O  -->  _____   HClO  +  _____   NH3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fact for #12: NH3 is ammonia.  Ammonia is commonly used as the refrigerant in large industrial refrigerators and freezers.

 

© 2005 Sulan Dun.  Legal. . Privacy statement  This worksheet accompanies the Review Chembalancer game which can be found at http://funbasedlearning.com/chemistry/default.htm