1. DO NOW: (On a sheet of notebook paper) 1
DO NOW: (On a sheet of notebook paper) 1. When looking at a reaction, which side of the arrow are the products located? Which side of the arrow are the reactants located? 2. What is the law of conservation of mass? 3. What are the numbers called that you place in front of products & reactants to balance a reaction? What do these numbers represent?
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…
Balance all 5 types of chemical reactions
Be able to identify a reaction as synthesis, decomposition, single replacement, double replacement, or combustion!
heat Pt

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

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

5. Element + Compound  Element +Compound
Single Replacement: An element and compound react to form a different element and compound
Common form:
Element + Compound  Element +Compound
A + BC  AC + B
heat Pt

6. Compound + Compound  Compound +Compound
Double Replacement: Two compounds react to form two new compounds
Common form:
Compound + Compound  Compound +Compound
AB + CD  AD + CB
heat Pt

7. ___ CH4 + ___O2  ___CO2 + ___H2O Tip: Balance the O2 last.
5. Combustion: A reaction with oxygen (O2)
___ CH4 + ___O2  2
___CO2
+ ___H2O 2 1 C 1 4 H 2 4 4 2 O 3 4
Tip: Balance the O2 last.

8. Work on your Worksheet! Due at the end of class!2 6 12 4 2 1 N 2 4 6 2 O 1 3 6