Persulfate
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A persulfate (sometimes known as peroxysulfate or peroxodisulfate) is a compound containing the anions SO2− 5 or S2O2− 8. The anion SO2− 5 contains one peroxide group per sulfur center, whereas in S2O2− 8, the peroxide group bridges the sulfur atoms. In both cases, sulfur adopts the normal tetrahedral geometry typical for the S(VI) oxidation state. These salts are strong oxidizers.
Ions
- Peroxomonosulfate ion, SO2− 5
- Peroxydisulfate S2O2− 8
Acids
- Peroxymonosulfuric acid (Caro's acid), H2SO5
- Peroxydisulfuric acid, H2S2O8
Example salts
- Sodium peroxomonosulfate, Na2SO5
- Potassium peroxymonosulfate, KHSO5
- Sodium persulfate (sodium peroxydisulfate), Na2S2O8
- Ammonium persulfate (ammonium peroxydisulfate), (NH4)2S2O8
- Potassium persulfate (potassium peroxydisulfate), K2S2O8
- Oxone is a triple salt 2KHSO5·KHSO4·K2SO4