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CharChem. Sulfurous acid
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Sulfurous acid

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Sulfurous acid

Molecular formula: H2O3S CAS# 7782-99-2
Categories: Inorganic acids
Names
English:
Acide sulfureux
Sulfur dioxide solution
Sulfurous acid(IUPAC)(CAS)
acido sulfuroso
Русский:
Сернистая кислота
German:
Dihydrogensulfat(IV)
Dihydrogensulfit(IUPAC)
Schwefel(IV)-säure
Schweflige Säure
Schwefligsäure
Ελληνικά:
Θειώδες οξύ
Español:
Ácido sulfuroso
French:
Acide sulfureux(IUPAC)
sulfite d'hydrogène(IUPAC)
Italiano:
Acido solforoso
acido triossosolforico (IV)(IUPAC)
solfito di idrogeno
日本語:
亜硫酸
中文:
亚硫酸

Variants of the formula:

H2SO3
H(+1)2S(+4)O(-2)3
HO-S`|O|-OH
O//S<_(A75)OH>_(A15)OH
H/O\S|O`|/O\H
Elemental composition
Can't show the diagram.
Symbol Element Atomic weight Number of atoms Mass percent

Reactions in which Sulfurous acid is involved

  • Na2SO3 + H2SO4 -> Na2SO4 + H2SO3
  • H2SO3 -> H2O + SO2"|^"
  • SO2 + H2O <=> H2SO3
  • {M}(OH)2 + H2{X} = {M}{X} + 2H2O , where M = Mg Ca Ba Sr Cu Zn; X = SO4 SO3 CO3
  • H2{X} + 2{M}OH = {M}2{X} + 2H2O , where X = SO4 SO3; M = Li Na K Rb