Pb(NO3)2 + KI PbI2 + KNO3 Balance the reaction. Pb(NO3)2 + KI Does anything happen? Do you have to do the reaction to know?

Pb(NO3)2 + KI PbI2 + KNO3 Balance the reaction. Pb(NO3)2 + KI Does anything happen? Do you have to do the reaction to know? Metathesis Reactions (Double Displacement) Given reactants: exchange positive ions to get products Requires a driving force (otherwise nothing happens) Driving Forces 1. Precipitate forms 2. Weak or nonelectrolyte forms 3. Gas forms How do you know what is happening? Example: Precipitation Reaction Mix silver nitrate and sodium chloride. What happens?