section_path: Examples of redox reactions/Disproportionation
section_name: Disproportionation
paragraph_text: Disproportionation
  
  A disproportionation reaction is one in which a single substance is both oxidized and reduced. For example, thiosulfate ion with sulfur in oxidation state +2 can react in the presence of acid to form elemental sulfur (oxidation state 0) and sulfur dioxide (oxidation state +4).
  
  Thus one sulfur atom is reduced from +2 to 0, while the other is oxidized from +2 to +4.