Distribute the substances by classes, name the substances Na2o, Ba (NO3) 2, BeO, H2S, Al (OH) 3, Fe (OH) 2, H2SO3, ZnCO3, MgS, Li3PO4

Oxides: Na2O, BeO (any chemical element + oxygen in the oxidation state -2)
Acids: H2S, H2SO3 (Hydrogen + acid residue)
Bases: Al (OH) 3, Fe (OH) 2 (Metal ion + hydroxide ion)
Salts: Ba (NO3) 2, H2SO3, ZnCO3, MgS, Li3PO4 (Metal ion + acid residue)



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