memorize solubility rules
Nitrates (NO3-)
Always soluble
Group IA
Always soluble
Ammonium ion (NH4+)
Always soluble
Acetates (C2H3O2-)
Always soluble
Halides (Cl-, Br-, I-)
Always soluble except Ag+, Pb2+, 2Hg2+
Sulfates (SO42-)
Soluble except AgSO4, PbSO4, CaSO4, SrSO4, BaSO4, Hg2SO4
Chromates (CrO4 2-)
NOT Soluble except group IA and NH4+
Phosphates (PO4 3-)
NOT Soluble except group IA and NH4+
Carbonates (CO3 2-)
NOT Soluble except group IA and NH4+
Hydroxides (OH-)
NOT Soluble except group IA and Ba2+, Sr2+, Ca2+