Below is an example of a precipitation reaction ... (aq)\) If state symbols are not given you need to use the solubility tables called "Solubilities of Selected Compounds in Water" in the SQA ...

In precipitation, a substance is subject to supersaturation (that is, the level at which the solute concentration exceeds its solubility at given conditions), causing it to precipitate.

The Journal of Infectious Diseases, Vol. 3, Supplement 2. Some of the Papers Presented to the Laboratory Section of the American Public Health Association at the Boston Meeting, Sept. 25, 1905 (Feb., ...