1. Classifying Chemical Reactions

2. Common Reaction Notation
Reactants are always on the left hand side
Products are always on the right hand side
Means to yield or produce
Example:
Peanut Butter + Jelly + Bread  PB&J Sandwitch

3. Combustion Reactions Burning something Combining it with oxygen
CH4 + O2  CO2 + H2O

4. Synthesis Reactions Two or more substances combine to make one product
Transfer of electrons
A + B  AB
2Na + Cl2  2NaCl

5. Decomposition Reactions
One reactant breaks down into two or more substances
AB  A + B
Usually require heat, electricity, or light
H2O  H2 + O2

6. Single Replacement Reactions
One element replaces another element in a compound
A + BC  AC + B
Cu + 2AgNO3  Cu(NO3)2 + 2Ag

7. Double Replacement Reactions
AX + BY  BX + AY
Two compounds switch ions
Usually form a precipitate – a solid
Pb(NO3)2 (aq) + KI (aq)  PbI2(s) + KNO3(aq)

8. BaCl2 + Na2(SO4)  NaCl + Ba(SO4)
Classify each reaction as synthesis, decomposition, combustion, single replacement, or double replacement
H O2  H2O 
Na H(OH)  Na(OH) H2
HgO  Hg O2
Al Fe2O3  Al2O Fe
C2H5OH O2  H2O + CO2
H N2  NH3
NH4NO2  N H2O
BaCl2 + Na2(SO4)  NaCl + Ba(SO4)