1. WARM UP
List 3 different types of redox reactions and show a simple equation of each.

2. Precipitation Reactions

3. Definition Double replacement (aq) reactants create (s) product
(s) is insoluble, called precipitate
Solubility determined by Table 4.2
Pb(NO3)2(aq) + 2KI(aq)  PbI2(s) + 2KNO3(aq)

4. Equation Forms Molecular equation The “normal” equation
Pb(NO3)2(aq) + 2KI(aq)  PbI2(s) + 2KNO3(aq)

5. Equation Forms Ionic equation Write ionic(aq) as + and – ions
Pb2+(aq) + 2NO3-(aq) + 2K+(aq) + 2I-(aq)  PbI2(s) + 2K+(aq) + 2NO3-(aq)

6. Equation Forms Pb2+(aq) + 2I-(aq)  PbI2(s) Net ionic equation
Cancel ions that are the same on both sides of equation
Pb2+(aq) + 2I-(aq)  PbI2(s)

7. WRAP UP
Describe what a precipitation reaction is in 10 words or less.