1. Decomposition Reactions
The Evil Twin to Synthesis

2. Definition
Decomposition is a reaction in which one reactant yields two or more products
One (complex) reactant breaks down into two or more (simpler) products

3. Decomposition may also be known as…
Electrolysis

4. Generic Word Equation
Reactant yields Product + Product

5. Algebraic Equation
AB  A + B

6. Examples with elements as products…
Sodium Chloride (s) 
Sodium (s) + Chlorine (g)

7. Electrolysis of …
Water (l) 
Hydrogen (g) + Oxygen (g)

8. Again because it was so cool the first time…
Sodium Chloride (s) 
Sodium (s) + Chlorine (g)

9. Carbon Dioxide (g) + Water (l)
Carbonic Acid (aq) 
Carbon Dioxide (g) + Water (l)

10. Iron (III) oxide (s) 
Iron (s) + Oxygen (g)

11. Why does the Iron (III) Oxide have a roman numeral?

12. Pictures courtesy of: