1. Chemical Reactions

2. Balancing Chemical Equations
No formulas were changed!
Draw lines in front of each formula to make a space for coefficients
One species at a time
Make 2 lists of all elements on each sides
Count the elements (and recount each time)
Use coefficients to balance the elements

3. Types of Chemical Reactions
Precipitation Reactions
Two solutions react to form a solid precipitate
Oxidation-Reduction (Redox) Reactions
Transfer of electrons from one element to another
Acid-Base Reactions
Neutralization Reactions make a salt and H2O

4. Types of Chemical Equation
Synthesis Reaction
Decomposition Reaction
Single Replacement Reaction
Double Replacement Reaction
Combustion Reaction

5. Synthesis Reaction A + B  AB
Two elements react to make a single product

6. Decomposition Reaction
AB  A + B
One reactant breaks down into 2 or more products

7. Single Replacement Reaction
AB + C  CB + A
AB + D  AD + B
One element and one compound react to make a new element and a new compound

8. Double Replacement Reaction
AB + CD  AD + CB
Two compounds react and rearrange to make two new compounds

9. Combustion Reaction A reaction with O2 Hydrocarbon Combustion
CxHy + O2  CO2 + H2O
Always produces CO2 and H2O as products
Combustion & Synthesis
H2 + O2  H2O
Fe + O2  FeO