(2) Common Polyatomic Ions

• Acetate


  C2H3O2^1-
• Ammonium Ion


  NH4^1-
• Carbonate


  CO3^2-
• Chlorate


  ClO3^1-
• Chlorite


  ClO2^1-
• Chromate


  CrO4^2-
• Cyanide

  CN^1-
• Dichromate


  Cr2O7^2-
• Bicarbonate


  HCO3^1-
• Bisulfate


  HSO4^1-
• Bisulfite


  HSO3^1-
• Hydroxide


  OH^1-
• Hypochlorite


  ClO^-1
• Nitrate


  NO3^-1
• Nitrite


  NO2^1-
• Oxalate


  C2O4^2-
• Perchlorate


  ClO4^1-
• Permanganate


  MnO4^1-
• Phosphate


  PO4^3-
• Sulfate


  SO4^2-
• Sulfite


  SO3^2-