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Sunday, August 15, 2021

Oxy acids of Sulphur:

 Oxidation state of sulphur atom and respective oxy-acids:

Oxidation state

 Series name

Prefix of acid

Name of acids

(+2)

“us”series

Hypo

Hyposulphurous acid

(+4)

“us”series

…….

Sulphurous acid

(+5)

“ic”series

Hypo

Hyposulphuric acid

(+6)

“ic”series

…….

Sulphuric acid

(+7)/(+8)Cal/ava

“ic”series

Peroxy

Peroxysulphuric acid

Important Note:

(1) Ortho and meta form of sulphurous and sulphuric acid not exist but both have pyro form only.

(2) Hyposulphurous acid start thionous series and while hyposulphuric acid start thionic series;

(1) Sulphurous Series:

(A) Sulphurous acid:

(B) Hyposulphurous acid(H2SO2/S(OH)2):

(C) Thiosulphurous acid(H2S2O2):

(D) Pyrosulphurous acid(H2S2O5=H2SO3+SO2):

(2) Sulphuric acid series:

(A) Sulphuric acid(H2SO4):

(B) Pyrosulphuric acid(H2S2O7=H2SO4+SO3): Oleum:

(C) Peroxomonosulphuric acid(H2SO5):Caro’s acid:

(D) Peroxodisulphuric acid(H2S2O8): Marshall’s acid:

(3) Thionous acid series

(4) Thionic acid series:

(A) Dithionic acid(H2S2O6):

(B) Trithionic acid (H2S3O6):

(C) Tetrathionic acid(H2S4O6):

Related Topics:

(1) What are the oxy-acids?

(2) What are "Ortho" or "Meta" oxyacids?

(3) What are "pyro" oxy acids?

(6) Prefix “Hypo-acids”, and “Per-acids”:


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