Question

Precipitation occurs when

Answer 1

Two compounds switch anions which leads to an insoluble product being produced.

Answer 2

two soluble salts are mixed together.

Answer 3

when ionic product > solubility product :)

Answer 4

http://en.wikipedia.org/wiki/Precipitation_(chemistry)

Answer 5

Precipitation may occur if the concentration of a compound exceeds its solubility. (By the way a precipitation is the formation of a solid inside of another solid or solution during a chemical reaction). When this occurs in a liquid solution, the solid found inside of the liquid solution is called the precipitate.