1. Net Ionic Equations

2. Write and balance the reactions
A solution of copper II chloride is added to a solution of sodium sulfide
Excess hydrobromic acid solution is added to a solution of potassium hydrogen carbonate
Butanol is burned in air.

3. Double Replacement Rxn (Precipitate forms)
Cu S -2  CuS

4. Acid and hydrogen carbonate yield carbon dioxide gas
H HCO  H2O CO2

5. Combustion of a hydrocarbon
Always yields water and carbon dioxide
C4 H9 OH O2  H2 O CO2

6. Strong Acid neutralized by strong base
Sulfuric acid with potassium hydroxide Complete equation: H2 SO4 + KOH  K2 SO4 + H2 O Net Ionic: 2 H OH-  2 H2 O

7. Weak Acid with strong base
Acetic acid with potassium hydroxide Complete equation H C2 H3 O2 + KOH  K C2 H3 O2 + H2 O Net Ionic Equation H C2 H3 O2 + OH-  C2 H3 O H2 O

8. Precipitation Reactions
The reactants are the ions that make up the precipitate. The reactants must be in aqueous solutions so they can dissociate and become ions.
Aqueous barium chloride and aqueous potassium sulfate
Ba SO  BaSO4