1. Balancing Chemical Equations

2. Chemical Equation Uses Chemical symbols and formulas as a shortcut to describe a chemical reaction. carbon dioxide + water ==> glucose + oxygen 6CO 2 + 6H 2 O ==> C 6 H 12 O 6 + 6O 2

3. Photosynthesis

4. Chemical Equation Reactants: starting materials (CO2 and H20) Products: substances formed (C6H12O6 and O2) carbon dioxide + water ==> glucose + oxygen 6CO 2 + 6H 2 O ==> C 6 H 12 O 6 + 6O 2

5. Chemical Equation Must be balanced (Reactants=products) 6CO 2 + 6H 2 O ==> C 6 H 12 O 6 + 6O 2 Carbon Atoms: 6 Oxygen Atoms: 18 Hydrogen Atoms: 12 So this must be balanced Gang!

6. Mr. Osen, Are they always balanced? No! That is your job! Coefficient: number placed in front of a chemical symbol or formula. Don’t forget about your Law of Conservation of Energy!

7. Lets practice! Poor Gummi! SnO 2 + H 2 → Sn + H 2 O

8. Lets try another one! Mentos/Coke Al+ O 2 Al 2 O 3

9. I’ll have another please… Foam Reaction Don’t forget young Jedi, you can always check your answers!