Polyatomic ions

C2H3O2-

• Acetate

• Ammonium

• Nitrite

Carbonate

• HCO3-

• CO3^2-

Hydrogen carbonate (or bicarbonate)

• HCO3-

• PO4^3-

OH-

• Sulfate

• Hydroxide

NO2-

• Nitrite

• Nitrate

NO3-

• Phosphate

• Nitrate

Phosphate

• NH4+

• PO4^3-

Ammonium

• NH4+

• SO4^2-

SO4^2-

• Nitrate

• Ammonium

• Sulfate