1. Balancing Equations
Chapter 8

2. Why do we balance equations??
It’s the Law
Law of Conservation of Mass

3. Law of Conservation of Mass
mass is neither created nor destroyed during the course of a chemical or physical reaction.

4. Law of Conservation of Mass
Reactants > Products
Mass of Reactants = Mass of Products

5. Law of conservation of Mass

6. How do we balance equations?
We must make sure that Products = Reactants
We use a Batting order!

7. Batting order Metals Other Cations Polyatomic ions Non-metals C H O
All diatomics

8. How do I do that? Take A simple reaction: C + O2  CO2
Do the products Equal the reactants?
What about …
N2 + H2  NH3??

9. So What do I do??

10. Batting order.. In this case the batting order is easy. N2 first.
I have 2 N on the reactant side so I add a coefficient on the product side.
N2 + H2  2NH3
What about the H’s?
I have a total of 6 H on the products so I use a Coefficient on the reactants side.
N2 + 3H2  2NH3
Are we balanced?

11. Backdrops: - These are full sized backdrops, just scale them up!
- Can be Copy-Pasted out of Templates for use anywhere!