AP CHEM Solubility Rules

Rule 1)

Salts of ammonium and alkali metals (column 1A excluding Hydrogen) are always soluble.

Rule 2)

All chlorides, bromides, and iodides are soluble except when combined with Ag, Hg2+, and Pb which are insoluble.

Rule 3)

Chlorates, acetates, and nitrates (CANs) are soluble.

Rule 4)

Sulfates are soluble except with Ca, Sr, Ba, and Pb, which are insoluble.

Rule 5)

Phosphates, carbonates, and sulfides are insoluble except ammonium and alkali metal compounds are soluble.

Rule 6)

All metallicoxides are insoluble except ammonium and alkali metal compounds are soluble.

Rule 7)

All hydroxides are insoluble except ammonium, alkali metal compounds, and when combined with Ca, Sr, and Ba which are soluble,

Soluble compounds ____ in water forming ____ solutions

dissolve; aqueous (aq)

Insoluble compounds ______ in water and remain ___

do NOT dissolve; solids (s)