AP Chemistry Ion List Ammonium Copper (I) or Cuprous Hydrogen Hydronium Lithium NH4+ Cu + + H H3O + + Li Potassium Silver Sodium Cesium K+ Ag + Na + Cs + Barium Cadmium Calcium Chromium (II) Cobalt (II) Copper (II) or Cupric Iron (II) or Ferrous Lead (II) or Plumbous Ba 2+ Cd 2+ Ca 2+ 2+ Cr Co 2+ Cu 2+ Fe 2+ Pb 2+ Magnesium Manganese (II) Mercury (I) or Mercurous Mercury (II) or Mercuric Nickel (II) Strontium Tin (II) or Stannous Zinc Mg 2+ Mn 2+ Hg2 2+ Hg 2+ Ni 2+ Sr 2+ Sn 2+ Zn 2+ Aluminum Arsenic (III) Bismuth (III) Al 3+ 3+ As 3+ Bi Chromium (III) Cobalt (III) Iron (III) or Ferric Cr 3+ Co 3+ Fe 3+ 4+ Lead (IV) or Plumbic Manganese (IV) Pb Mn 4+ 4+ Tin (IV) or Stannic Sn 4+ 5+ Arsenic (V) As 5+ Bismuth (V) Bi 5+ 1- Bromide Perbromate Bromate Bromite Hypobromite Chloride Perchlorate Chlorate Chlorite Hypochlorite Cyanide Dihydrogen Phosphate Ethanoate or Acetate Fluoride Hydride Br – BrO4 – BrO3 – BrO2 – BrO – Cl – ClO4 – – ClO3 ClO2 – ClO – CN – H2PO4 – C2H3O2 – F– H– Hydrogen Carbonate or Bicarbonate Hydrogen Oxalate or Binoxalate Hydrogen Sulfate or Bisulfate Hydrogen Sulfite or Bisulfite Hydrogen Sulfide or Bisulfide Hydroxide Iodide Periodate Iodate Iodite Hypoiodite Permanganate Nitrate Nitrite Thiocyanate HCO3 – HC2O4 – HSO4 – HSO3 – HS – OH – I– IO4 – IO3 – IO2 – IO – MnO4 – NO3 – NO2 – SCN – Carbonate Chromate Dichromate Hydrogen Phosphate Oxalate Oxide CO3 2CrO4 22Cr2O7 2HPO4 C2O4 2O 2- Peroxide Sulfite Sulfide Sulfate Thiosulfate O2 2SO3 2S 2SO4 2S2O3 2- Nitride Phosphide N P 3- Phosphate Phosphite PO4 3PO3 3- hydro ROOT – ic ROOT – ic ROOT – ous Acid Acid Acid 1+ 2+ 3+ 2- 3- Acid Rules H + _____- ide H + _____- ate H + _____- ite 3- = = =