1. DO NOW: On your notes for today
DO NOW: On your notes for today! 1)K3(PO3) 2) PF5 3) H2(S2O3) 4) GaF3 5)N2O4
Upper left: Thermite reaction, Fe2O3 + Al => 2Fe +2Al2O3 + HEAT!!!
Upper right: potassium in water, K + H2O => KOH + H2 + HEAT
Bottom right: potassium chlorate and sugar, C12H22O11 + 8KClO3 => 12CO2 + 11H2O + 8KCl + HEAT!!!
Bottom left: magnesium reacting with oxygen, Mg + O2 => MgO

2. After today you will be able to…
Identify synthesis and decomposition reactions
Predict the products in words for synthesis and decomposition reactions
heat Pt

3. Types of Chemical Reactions
Synthesis
Decomposition
Single Replacement
Double Replacement
Combustion
heat Pt

4. Element + Element  Compound
Predicting Products
Synthesis: Two elements combine to form a compound
Common form:
Element + Element  Compound
A + B  AB
heat Pt

5. Examples of synthesis:
sodium + chlorine  magnesium + phosphorus  sulfur + aluminum 
(Metal)
(Non-metal)
(Metal)
(Non-metal)
sodium chloride
magnesium
phosphide
aluminum sulfide
heat Pt

6. Compound  Element + Element
Predicting Products
2. Decomposition: A compound breaks down into elements and/or smaller compounds Common form:
Compound  Element + Element
AB  A + B
heat Pt

7. DEMONSTRATION! Decomposition of Ammonium Dichromate BALANCE IT!!!!!
_(NH4)2Cr2O7(s) _N2(g) + _H20(g) + _Cr2O3(s)
Compound  Element + Element
AB  A + B
heat Pt

8. Examples of decomposition:
potassium nitride 
potassium + nitrogen
Go back to the non-metal’s original ending.
heat Pt

9. Examples of “special” decompositions:1.
Example of a metal chlorate decomposition:
barium chlorate 
metal chlorate  metal chloride + oxygen
(ClO3)-1
barium chloride + oxygen
Always a part of the product!
heat Pt

10. Examples of “special” decompositions:2.
Example of a metal carbonate decomposition:
potassium carbonate
metal carbonate  metal oxide + carbon dioxide
(CO3)-2
potassium oxide + carbon dioxide
Always a part of the product!
heat Pt

11. Examples of “special” decompositions:3.
Example of a metal hydroxide decomposition:
tin (IV) hydroxide
metal hydroxide  metal oxide + water
(OH)-1
tin(IV) oxide + water
Always a part of the product!
Don’t forget the Roman numeral!
heat Pt

12. WORK ON YOUR WORKSHEET! IT IS DUE!!!