1. Reactions & Reaction Types
Rxn = Reaction

2. Chemical Reaction
Process that changes chemical substances into different substances.
Atoms are rearranged in a chemical reaction

3. 2H2 + O2 2H2O Chemical Reaction Produces Makes Yields Forms Reactants
Products
Reactants

4. 5 MAIN TYPES OF CHEM RXNS

5. Synthesis (combination)
Definition
Variable example
Two elements combine to form one compound
A+BAB
Synthesis (combination)
Example
Prom analogy
One single guy and one single girl arrive at prom. They end up getting together at prom
Hydrogen reacts with oxygen to form water
2H2+O22H2O + 

6. A compound breaks down into smaller forms
Definition
Variable example
A compound breaks down into smaller forms
ABA+B
Decomposition
Example
Prom analogy + 
A couple arrives at
prom, they get into a fight
and break up. They stay alone for the rest of the night.
2KClO3 2KCl + 3O2
Potassium Chlorate
when heated decomposes to
Potassium Chloride and Oxygen

7. A+BYAY+B Single displacement + 2Na+CuCl22NaCl+Cu 
Definition
Variable example
An element displaces (replaces) part of a compound- only if it is more reactive
A+BYAY+B
Single displacement
Example
Prom analogy
2Na+CuCl22NaCl+Cu
Sodium reacts with
Copper (II) Chloride to
produce Sodium Chloride and solid Copper (sodium is more reactive than copper) + 
A single guy and a couple are
at prom. Since the single guy is
hotter (more reactive),
the girl leaves her guy to be with the new guy becoming a new couple.

8. AX+BYAY+BX Double displacement +  Na2SO4+Ba(NO3)2NaNO3+BaSO4
Definition
Variable example
The elements of compounds displace (replace) each other in the compounds)
AX+BYAY+BX
Double displacement
Example
Prom analogy
Na2SO4+Ba(NO3)2NaNO3+BaSO4
Sodium Sulfate reacts
with Barium Nitrate to
produce a solution of Sodium Nitrate and insoluble Barium Sulfate + 
Two couples arrive at prom. They each fight and end up trading partners.

9. The burning of a substance in oxygen (usually a hydrocarbon)
Definition
Variable example
The burning of a substance in oxygen (usually a hydrocarbon)
CxHy+O2CO2 +H2O
Combustion
Example
Picture
Methane burning to produce carbon dioxide and water
CH4+ 2O2CO2+2H2O