AP Chem: Solubility Rules 2016

Alkali metal ions
(Li+, Na+, K+, Rb+, Cs+)

Always soluble

NH4+

Always soluble

NO3-

Always soluble

ClO3-

Always soluble

ClO4-

Always soluble

C2H3O2-

Always soluble

HCO3-

Always soluble

Cl-, Br-, I- are soluble except

Ag+, Pb2+, and Hg(2)2+
(AP/H)

F- is soluble except

Ca2+, Sr2+, Ba2+, Pb2+ , Mg2+
(CBS-PM)

SO4 2- is soluble except

Ca2+, Sr2+, Ba2+, Pb2+
(C/PBS)

O2-, OH- insoluble except

alkali metal ions and NH4+
Ca2+, Sr2+, Ba2+ (CBS) are what somewhat soluble.

CO3 2-

insoluble except alkali metal ions and NH4+

PO4 3-

insoluble except alkali metal ions and NH4+

S 2-

insoluble except alkali metal ions and NH4+

SO3 2-

insoluble except alkali metal ions and NH4+

C2O4 2-

insoluble except alkali metal ions and NH4+

CrO4 2-

insoluble except alkali metal ions and NH4+