1. February 08, 2013 AGENDA: 1 – Bell Ringer/Agenda
Today’s Goal:
Students will be able to balance chemical reactions.
Homework
Complete More Balancing Classwork– due Monday
ALL Week 21 late work – due today for partial credit
Empty/Organize Binder for Binder check Monday
REVIEW for QUIZ!
AGENDA:
1 – Bell Ringer/Agenda
2 – Review for Quiz and Binder check Monday
3 – Review Classwork – Balancing
4 – Classwork Time

2. 3 MINUTES REMAINING…

3. Friday, February 08 Objective:
Students will be able to balance chemical reactions.
Bell Ringer: Balance the following chemical equation:
___CH4 + ___O2  ___CO2 + ___H2O
C = C =
H = H =
CO2: O =
H2O: O =
Total: O = Total: O =

4. 2 MINUTES REMAINING…

5. Friday, February 08 Objective:
Students will be able to balance chemical reactions.
Bell Ringer: Balance the following chemical equation:
___CH4 + ___O2  ___CO2 + ___H2O
C = C =
H = H =
CO2: O =
H2O: O =
Total: O = Total: O =

6. 1 minute Remaining…

7. Friday, February 08 Objective:
Students will be able to balance chemical reactions.
Bell Ringer: Balance the following chemical equation:
___CH4 + ___O2  ___CO2 + ___H2O
C = C =
H = H =
CO2: O =
H2O: O =
Total: O = Total: O =

8. 30 Seconds Remaining…

9. Friday, February 08 Objective:
Students will be able to balance chemical reactions.
Bell Ringer: Balance the following chemical equation:
___CH4 + ___O2  ___CO2 + ___H2O
C = C =
H = H =
CO2: O =
H2O: O =
Total: O = Total: O =

10. BELL-RINGER TIME IS UP!

11. February 08, 2013 AGENDA: 1 – Bell Ringer/Agenda
Today’s Goal:
Students will be able to balance chemical reactions.
Homework
Complete More Balancing Classwork– due Monday
ALL Week 21 late work – due today for partial credit
Empty/Organize Binder for Binder check Monday
REVIEW for QUIZ!
AGENDA:
1 – Bell Ringer/Agenda
2 – Review for Quiz and Binder check Monday
3 – Review Classwork – Balancing
4 – Classwork Time

12. Friday, February 08 Objective:
Students will be able to balance chemical reactions.
Bell Ringer: Balance the following chemical equation:
___CH4 + ___O2  ___CO2 + ___H2O
C = C = 1
H = H = 2
CO2: O = 2
H2O: O = 1
Total: O = 2 Total: O = 3

13. Friday, February 08 1 2 1 2 Objective:
Students will be able to balance chemical reactions.
Bell Ringer: Balance the following chemical equation:
___CH4 + ___O2  ___CO2 + ___H2O
C = 1 x 1 = C = 1 x 1 = 1
H = 4 x 1 = H = 2 x 2 = 4
CO2: O = 2 x 1 = 1
H2O: O = 1 x 2 = 2
Total: O = 2 x 2 = 4 Total: O = 3  4 1 2 1 2

14. Quiz Monday – 30 pts
Objective 1 – 5 pts – Students will be able to create formulas and name ionic and covalent compounds.
Objective 2 – 15 pts – Students will be able to identify chemical reactions (3 indicators) and convert chemical and word equations.
Objective 3 – 10 pts – Students will be able to balance chemical equations.

15. Binder Check Monday – 40 pts
All 8 dividers properly labeled = 15 pts
Unit Cover Sheets
Bell Ringers
Notes – 3 sets of notes (one hand out, 2 in notebook) 15 pts
Classwork – 2 classwork assignments – 10 pts
Homework
Labs
Quizzes
Tests

16. Why do we balance chemical equations?
Cornell Notes
Topic: Balancing Chemical Reactions
Date: 2/07/2013
MgO  Mg + O2
Reactants  Products
Why do we balance chemical equations?
Things reacting
Things produced

17. Cornell Notes (continued)
Law of Conservation of Mass/Matter = =
Mass of reactants
Mass of products
# of each element of the reactants
# of each element of the products

18. Cornell Notes (continued)
Reactants ___ MgO Mg = 1 O = 1
Products ___ Mg + ___ O2 Mg = 1 O = 2
Example: 2 2 1
Coefficients
x 2 = 2
x 2 = 2
x 2 = 2
x 1 = 2
Balanced Chem. Eqn. =
2 MgO  2 Mg O2
= Mg
= O  +

19. Cornell Notes (continued)
“How to Balance” Steps:
Draw a line between reactants & products.
Count up all atoms of reactants & products.
Determine multiplier (coefficient)  LCD.
Place multiplier (coefficient) in front of compound, and multiply in your total.
Save balancing the H and O until LAST!
(hint: I prefer to save O until the very last)
Double-Check to make sure it is balanced!

20. Practice (on LEFT page)
Counting Atoms: O2
O = 2
Fe2O3
Fe = 2
O = 3
2 NaOH
Na = 2
O = 2
H = 2
2 Ca(NO3)2
Ca = 2
N = 4
O = 12

21. Practice (continued)
Reactants ___ Ag + ___CuCl2 Ag = 1 Cu = 1 Cl = 2
Products ___ Cu + ___ AgCl Ag = 1 Cu = 1 Cl = 1
Example: 2 1 1 2
x 2 = 2
x 2 = 2
x 1 = 1
x 1 = 1
x 1 = 2
x 2 = 2

22. Never
Never change a subscript to balance an equation (You can only change coefficients)
H2O is a different compound than H2O2
If you change the subscript (formula) you are describing a different chemical.
Never put a coefficient in the middle of a formula; they must go only in the front
2NaCl is okay, but Na2Cl is not.

23. Practice (continued) 2 4 3 Reactants ___ Al2O3 Al = 2 O = 3
Products ___ Al + ___ O2 Al = 1 O = 2
Example: 2 4 3
x 2 = 4
x 4 = 4
x 2 = 6
x 3 = 6

24. Practice Balancing Examples
_AgNO3 + _Cu ® _Cu(NO3)2 + _Ag
_Mg + _N2 ® _Mg3N2
_P + _O2 ® _P4O10
_Na + _H2O ® _H2 + _NaOH
_CH4 + _O2 ® _CO2 + _H2O 2 2 3 4 5 2 2 2 2 2