Alkali metals
always soluble
ammonium(NH4+)
always soluble
Nitrate (NO3-)
always soluble
Chlorates (ClO3-, etc.)
always soluble
acetate (C2H3O2 -)
always soluble
Chloride (Cl -)
Soluble, except Ag, Pb, Hg2
Bromide (Br-)
Soluble, except Ag, Pb, Hg2
Iodide (I-)
Soluble, except Ag, Pb, Hg2
Sulfate (SO4 2-)
Soluble, except Sr, Ba, Hg2 or Pb
Sulfide (S 2-)
Not soluble, except with alkali metals, NH4, Ca, Sr, Ba
CO3 2-
not soluble except 1A, NH4+
PO4 3-
not soluble except 1A, NH4+
OH-
Not soluble except 1A, NH4+, Ca, Sr, Ba