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Sulfurous Acid

 
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Sulfurous acid
 
 
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Sulfurous acid is the chemical compound
Chemical compound

A chemical compound is a Chemical substance consisting of two or more different chemical element Chemical bond together in a fixed mass ratio that can be split into simpler substances....
 with the formula
Chemical formula

A chemical formula is a way of expressing information about the atoms that constitute a particular chemical compound, and how the relationship between those atoms changes in chemical reactions....
 H2SO3. There is no evidence that sulfurous acid exists in solution, but the molecule has been detected in the gas phase. The conjugate bases of this elusive acid are, however, common anions, bisulfite
Bisulfite

Bisulfite ion is the ion HSO3-. Salts containing the HSO3- ion are termed bisulfites also known as sulfite lyes....
 (or hydrogensulfite) and sulfite
Sulfite

Sulfites are chemical compound that contain the sulfite ion sulfuroxygen32- ....
.

Raman spectra
Raman spectroscopy

Raman spectroscopy is a Spectroscopy technique used in condensed matter physics and chemistry to study vibrational, rotational, and other low-frequency modes in a system....
 of solutions of sulfur dioxide
Sulfur dioxide

Sulfur dioxide is the chemical compound with the formula SO2. It is produced by volcanoes and in various industrial processes. Since coal and petroleum often contain sulfur compounds, their combustion generates sulfur dioxide....
 in water show only signals due to the SO2 molecule and the bisulfite ion, HSO3−.






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Encyclopedia


Sulfurous acid is the chemical compound
Chemical compound

A chemical compound is a Chemical substance consisting of two or more different chemical element Chemical bond together in a fixed mass ratio that can be split into simpler substances....
 with the formula
Chemical formula

A chemical formula is a way of expressing information about the atoms that constitute a particular chemical compound, and how the relationship between those atoms changes in chemical reactions....
 H2SO3. There is no evidence that sulfurous acid exists in solution, but the molecule has been detected in the gas phase. The conjugate bases of this elusive acid are, however, common anions, bisulfite
Bisulfite

Bisulfite ion is the ion HSO3-. Salts containing the HSO3- ion are termed bisulfites also known as sulfite lyes....
 (or hydrogensulfite) and sulfite
Sulfite

Sulfites are chemical compound that contain the sulfite ion sulfuroxygen32- ....
.

Raman spectra
Raman spectroscopy

Raman spectroscopy is a Spectroscopy technique used in condensed matter physics and chemistry to study vibrational, rotational, and other low-frequency modes in a system....
 of solutions of sulfur dioxide
Sulfur dioxide

Sulfur dioxide is the chemical compound with the formula SO2. It is produced by volcanoes and in various industrial processes. Since coal and petroleum often contain sulfur compounds, their combustion generates sulfur dioxide....
 in water show only signals due to the SO2 molecule and the bisulfite ion, HSO3−. The intensities of the signals are consistent with the following equilibrium
Chemical equilibrium

In a chemical process, chemical equilibrium is the state in which the Activity or concentrations of the reactants and products have no net change over time....
:

SO2 + H2O HSO3− + H+ Ka = 1.54; pKa = 1.81.

Aqueous solutions of sulfur dioxide, which sometimes are referred to as sulfurous acid are used as reducing agents
Redox

Redox describes all chemical reactions in which atoms have their oxidation number changed.This can be either a simple redox process such as the oxidation of carbon to yield carbon dioxide or the reduction of carbon by hydrogen to yield methane , or it can be a complex process such as the oxidation of sugar in the human body through a ser...
 and as disinfectants, as are solutions of bisulfite and sulfite salts. They are also mild bleach
Bleach

A bleach is a chemical that removes colors or whitens, often via oxidation. Common chemical bleaches include household "chlorine bleach", a solution of approximately 3?6% sodium hypochlorite , and "oxygen bleach", which contains hydrogen peroxide or a peroxide-releasing compound such as sodium perborate, sodium percarbonate, sodium persulfat...
es, and are used for materials which may be damaged by chlorine
Chlorine

Chlorine...
-containing bleaches.

See also

  • Sulfite
    Sulfite

    Sulfites are chemical compound that contain the sulfite ion sulfuroxygen32- ....
  • Sulfuric acid
    Sulfuric acid

    Sulfuric acid, hydrogen2sulfuroxygen4, is a strong mineral acid. It is soluble in water at all concentrations. Sulfuric acid has many applications, and is one of the top products of the chemical industry....
  • Bisulfite
    Bisulfite

    Bisulfite ion is the ion HSO3-. Salts containing the HSO3- ion are termed bisulfites also known as sulfite lyes....
  • Carbonic acid
    Carbonic acid

    Carbonic acid has the Molecular formula H2CO3. It is also a name sometimes given to solutions of carbon dioxide in water , which contain small amounts of H2CO3....
    , another hypothetical acid used to represent a dissolved gas