1. Translating Equations Practice

2. Evaluation/Assessment:
Objective:
Today I will be able to:
Utilize the law of conservation of mass
Balance chemical equations
Correctly translate equations from words to symbols
Evaluation/Assessment:
Informal assessment – listening to student responses as the complete the practice problems
Formal assessment – analyzing student responses to the translation practice problems and the exit ticket
Common Core Connection
Build Strong Content Knowledge
Make sense of problem and persevere in solving them
 Model with mathematics
Use appropriate tools strategically
Look for and express regularity in repeated reasoning

3. Lesson Sequence Evaluate: Warm – Up
Explain and Elaborate: Balancing Equations
Elaborate: Translating Equations
Evaluate: Exit Ticket

4. Warm – Up Translate the following word equations:
Ammonia reacts with hydrogen chloride to form ammonium chloride.
Calcium Carbonate (CaCO3) decomposes to form calcium oxide and carbon dioxide.
What are the 7 diatomic elements?

5. Warm – Up Answers Translate the following word equations:
Ammonia reacts with hydrogen chloride to form ammonium chloride.
NH3 + HCl -> NH4Cl
Calcium Carbonate (CaCO3) decomposes to form calcium oxide and carbon dioxide.
CaCO3 -> CaO + CO2
What are the 7 diatomic elements?
H2 N2 O2 F2 Cl2 I2 Br2

6. Objective Utilize the law of conservation of mass
Correctly translate equations from words to symbols
Balance chemical equations

7. Homework
None

8. Agenda Warm – Up Balancing chemical equations
Translating Equations Practice
Exit Ticket

9. 7 Diatomic Elements
More Stable for them to exist with 2 bonded together
H2 N2 O2 F2 Cl2 I2 Br2

10. Balancing Chemical Equations Notes

11. What is the Law of Conservation of Matter?
Matter can not be created or destroyed, it can be transformed from one form to another.

12. Why is this important for chemical equations?
Same number of each element on the reactant side as the product side
Balanced

13. Tips for Balancing Equations
Must satisfy the law of conservation of matter
Only use whole number coefficients
All atoms should be present on both the reactant and product side of the equation
Check to see if the equation is already balanced
Coefficients go in front of the substance and multiply all subscripts

14. Tips for balancing equations continued
One (1) is understood and does not have to be written as a coefficient
All coefficients should be reduced to lowest terms
Balance most complex species first and then move to single atoms
Double check your work!

15. Example #1
BaS + NaCl  Na2S + BaCl2

16. Answer
BaS + 2 NaCl  Na2S + BaCl2

17. Example #2
P + O2  P2O5

18. Answer
4P + 5O2  2P2O5

19. Example #3
Na2O2 + H2O  NaOH+ O2

20. Answer
2Na2O2 + 2H2O  4NaOH+ O2

21. Balancing Equations Practice
Complete #1 of the practice at your desk.

22. Exit Ticket Translate and balance the following equation:
Zinc reacts with copper(II) nitrate to form zinc nitrate and copper.
2 Zn + Cu(NO3)2 --> 2 ZnNO3 + Cu