Oxoacids of sulphur preparation and properties, Group 16 P Block Elements
Oxoacids of Sulphur :
Sulphur forms various oroacide like H2SO3, H2S2O3, H2S2O4, H2S2O5, H2SO4, H2SO5 etc. Some of these acids are unstable and cannot be isolated in free state. They are known in aqueous solution or in the form of their alts The wtructures of these oxyacids are given below.
Sulphurous acid (H2SO3): Free acid does not exist. dipratic, strong reducing agent.
Sulphurie Acid (H2SO2): (Oil of vitriol): Stable, diprotic, dehydrating agent.
Peroxomono sulphuric acid or Caro’s acid (H2SO5)
Peroxodisulphuric acid or Marshall’s acid (H2SO2O8)
Thiosulphurie acld (H2S2O3): Pree acid does not exist but its salte.g. Na2S2O3 is found. All quite stable reducing agent.
Dithionic acid (H2S2O6) : Free acid is moderately stable but its salts are quite stable.
Pyrosuiphuric acid or oleum (H2S2O7) or disuiphuric acid strong oxidizing agent.
Polythionic Acid (H2S4O6)
Dithionous acid (H2S2O4)