In this chem talk, things started out with an explanation for how solid precipitates can be used as pigments for paints. The solid precipitate is crushed into a powder, and then mixed with a liquid to create the actual paint. When paint dries, the pigment is left behind. This is probably the explanation for why paint turns hard after it dries on a panting. The chem talk also got my mind thinking about the forming of precipitates with insoluble solutions. This is how salts are formed. The confusing part of the talk was when spectator ions and the net ionic equations were introduced. The list of simple rules for solubility of ionic compounds in water though seemed to clear some stuff up and will probably be useful in the future.