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NH4+
ammonium
H3O+
hydronium
OH¯
hydroxide
NO2−
nitrite
NO3-
nitrate
CN-
cyanide
ClO3-
chlorate
ClO4-
perchlorate
CH3CO2-
acetate
HCO3-
bicarbonate (aka hydrogen carbonate)
(CO3)2-
carbonate
(SO3)2-
sulfite
(SO4)2-
sulfate
(PO4)3-
phosphate