most nitrate salts
are soluble
most alkali metal (group 1A) salts and NH4
are soluble
most Cl-, Br-, and I- salts
are soluble (except Ag+, Pb2+, Hg2+)
most sulfate salts
are soluble (except BaSO4, PbSO4, Hg2SO4, CaSO4)
OH- with alkali metals
are soluble
OH- is marginally soluble
Ba(OH)2, Sr(OH)2, Ca(OH)2
most S2-, CO32-, CrO42-, PO43- salts
are only slightly soluble (except for those containing the cations in Rule 2)