Salts of NH4+ and the alkali metal cations
soluble
Chlorides (Cl-)
soluble except AgCl, Hg2Cl2, PbCl2
Bromides (Br-)
soluble except Ag, Hg, Pb
Iodides (I-)
Soluble except AgI, Hg2I2, HgI2, PbI2
Chlorates (ClO3-, etc.)
always soluble
Perchlorates (ClO4-)
soluble
Nitrates (NO3-) and Nitrites (NO2-)
always soluble
Acetates (CH3COO-)
soluble
Sulfates (SO4 2-)
Soluble except CaSO4, SrSO4, BaSO4, Hg2SO4, HgSO4, PbSO4, and Ag2SO4
Phosphates (PO4 3-)
insoluble except Group 1A and NH4+
Carbonates (CO3 2-)
insoluble except Group 1A and NH4+
metallic oxides (O2-)
insoluble except NH4+ and Group 1A
Metallic Hydroxides (OH-)
insoluble except NH4+ and group 1A and group 2A from calcium down
Sulfides (S2-)
insoluble except Group 1A and NH4+
Sulfites (SO3 2-)
insoluble except Group 1A and NH4+
Chromates (CrO4 2-) (Cr2O7 2-)
AgCl
insoluble
Hg2Cl2
insoluble
PbCl2
insoluble
AgBr
insoluble
Hg2Br2
insoluble
HgBr2
insoluble
PbBr2
insoluble
AgI
insoluble
Hg2I2
insoluble
HgI2
insoluble
PbI2
insoluble
CaSO4
insoluble
SrSO4
insoluble
BaSO4
insoluble
Hg2SO4
insoluble
HgSO4
insoluble
PbSO4
insoluble
Ag2SO4
insoluble
NH4PO4
soluble
NH4CO3
soluble
(Group IA) PO4
soluble
(Group IA) CO3
soluble
(NH4)2O
Soluble
(Group IA) O2-
soluble
NH4OH
soluble
(NH4)2S
soluble
(Group IA or Group IIA from Ca down) OH-
soluble
(Group IA or IIA) S2-
soluble