Polyatomic ions to be memorized
(100 class can leave out the highlighted ones)
Polyatomic Ion Charge = +1
Polyatomic Ion Charge = -1
ammonium: NH4+
perchlorate : ClO4chlorate: ClO3chlorite: ClO2hypochlorite : ClO-
-
Hydroxide: OH
Cyanide: CNAcetate: C2H3O2cyanate : OCNthiocyanate: SCNhydrogen sulfate (or bisulfate): HSO4hydrogen sulfite: HSO3-
Nitrate: NO3Nitrite: NO2-
hydrogen carbonate (or bicarbonate ): HCO3dihydrogen phosphate: H2PO4Polyatomic Ion Charge = -2
Carbonate: CO32Oxalate: C2O42hydrogen phosphate : HPO42peroxide: O22Polyatomic Ion Charge = -3
permanganate: MnO4-
Sulfate: SO42Sulfite: SO32Thiosulfate: S2O32 –
Persulfate: S2O82 –
Phosphate: PO43Arsenate: AsO43Borate: BO33-
perbromate : BrO4bromate : BrO3bromite : BrO2hypobromite: BrOperiodate : IO4iodate : IO3iodite : IO2hypoiodite: IOChromate: CrO42dichromate: Cr2O72-