Hydroxide
OH’
Colorless
Peroxide
O2 ²’
Colorless
Nitrate
NO3’
Nitrite
NO2’
Colorless
Sulfate
SO4²’
Colorless
Sulfite
SO3²’
Colorless
Hydrogensulfate
HSO4’
Colorless
Hydrogensulfite
HSO3’
Colorless
Carbonate
CO3²’
Colorless
Bicarbonate
HCO3’
Colorless
Phosphate
PO4³’
Colorless
Oxalate
C2O4²’
Colorless
Acetate
CH3COO’
Colorless
Permanganate
MnO4’
Violet
Dichromate
Cr2O7²’
Orange
Cyanide
CN’
Colorless