Solubility Rules*

Soluble Compounds

nitrates (NO3-) & acetates (C2H3O2-) (no exceptions)
ammonium (NH4+) compounds (no exceptions)
 
Group I compounds (no exceptions)
strong acids (no exceptions)

chlorides - except AgCl, PbCl2, Hg2Cl2
bromides - except AgBr, PbBr2, Hg2Br2
iodides - except AgI, PbI2, Hg2I2
sulfates - except SrSO4, BaSO4, Hg2SO4, PbSO4

Insoluble Compounds
carbonates & phosphates - except NH4+ and Group I
sulfides (S2-) & hydroxides (OH-) - except NH4+, Group I,

 
Ca2+, Sr2+, Ba2+

*These are reorganized solubility rules from Brown & LeMay, 12th Edit., Table 4.1, p. 121.