1) Use the solubility table and classify each compound as water soluble or water insoluble. Li3PO4SrSO4Ba(OH)2Ni(NO3)2 Solubility Table Water-Soluble Compounds Insoluble Exceptions Compounds containing an alkali metal cation (Li+,Na+,K+,Rb+,Cs+)or the ammonium ion (NH4+) Compounds containing the nitrate ion (NO3), acetate ion (C2H3O2), or chlorate ion (ClO3) Compounds containing the chloride ion (Cl), bromide ion (Br), or iodide ion (I) Compounds containing Ag+,Hg22+, or Pb2+ Compounds containing the sulfate ion (SO42) Compounds containing Ag+,Hg22+,Pb2+,Ca2+,Sr2+, or Ba2+ Water-Insoluble Compounds Soluble Exceptions Compounds containing the carbonate ion (CO32), phosphate ion (PO43), chromate Compounds containing. ion (CrO42), or sulfide ion (S2) Li+,Na+,K+,Rb+,Cs+, or NH4+ Compounds containing the hydroxide ion (OH) Compounds containing Li+,Na+,K+,Rb+,Cs, or Ba2+