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Persulfate
Introduction
The term persulfate refers to ions or compounds with more oxygen than normal sulfates.
These do not have sulfur in a different oxidation state; rather, they contain peroxide units, where two oxygens take the place of one in a normal sulfate; the oxygen atoms are in oxidation state −1.
The main forms are peroxomonosulfates and peroxodisulfates.
Ions
Ions
- Peroxomonosulfate (or Peroxymonosulfate) ion, SO52−
- Peroxodisulfate (or Peroxymonosulfate) ion, S2O82−
Example salts
Example salts
- Sodium peroxomonosulfate, Na2SO5
- Potassium peroxymonosulfate, KHSO5
- Sodium peroxodisulfate, Na2S2O8