Describe sulphurous acid, Chemistry

Assignment Help:

Q. Describe Sulphurous Acid ?

Sulphurous acid H2SO3 is known only in solution. It exists mainly as a hydrate of sulphur dioxide SO2. 7H2O two series of salts the bisulphites containing HSO-3 and sulphites containing SO2-3 ions are well known.

Sulphurous acid possesses both oxidising as well as reducing properties. It owes its reducing   nature to the ease with which it can get oxidised to sulphuric acid. It reduces I2, to HI, KMnO4 to MnSO4, and K2, Cr207 to Cr2(SO4)3.

H2SO3 + H2O + I2----------------> H2SO4 + 2HI

2KMnO4+ 5SO2+ 2H2O-------> K2SO4+ 2MnSO4+ 2H2SO4

K2Cr2O7+ 3SO2+ H2SO4---------> K2SO4+ Cr2 (SO4) 3 + H2O

In the presence of strong reducing agents like H2S, it can behave as an oxidising agent.

2H2S+ H2SO3-------------------> 3H2O + 3S

Sodium and calcium bisulphite solutions are used in making paper from, wood because they dissolve fibrous material lignin and facilitate pulping of cellulose.


Related Discussions:- Describe sulphurous acid

Thermogravimetric analysis, #question.factors affecting thermogravimetric c...

#question.factors affecting thermogravimetric curves.

Determine the overall efficiency of each plant, Three power plants have bee...

Three power plants have been suggested that operate at these efficiencies. Plant Power Plant Efficiency (%) I 81

Describe the property of radioactive decay, Q. Describe the Half -Life  pro...

Q. Describe the Half -Life  property of radioactive decay? Ans. The decay of a nucleus is a random event. It is impossible to predict which nucleus will decay and when.

Physical, find H^+ concentration if Ph=4.90

find H^+ concentration if Ph=4.90

Matter, Q.give characterstics of matter?

Q.give characterstics of matter?

Cordination compounds, i want some 25 exampels of nomenculature of complex...

i want some 25 exampels of nomenculature of complex coordination compounds

Chemical reaction, How is chemical reaction reversible and irreversible?

How is chemical reaction reversible and irreversible?

What is calcinations process, Q. What is Calcinations process? This is ...

Q. What is Calcinations process? This is fie method of heating the concentrated ore in a limited supply of air to a high temperature but under the fusion temperature. In calcin

Determination of molecular mass - victor meyer method , Determination of Mo...

Determination of Molecular Mass - Victor Meyer method Molecular mass of volatile liquids and solids that can be easily ascertained from the application of Avogadro hypothesis a

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd