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

The following compound has electrovalent linkage, Which of the following co...

Which of the following compound has electrovalent linkage: (1)  CH 3 Cl                                                   (2)  Nacl             (3)  CH 4

The electronic configuration of four elements, The electronic configuration...

The electronic configuration of four elements are given in brackets:  L (1s 2 , 2s 2 , 2p 1 , ) M (1s 1 , 2s 2 , 2p 5 ) Q (1s 2, 2s 2 , 2p 6 3s 1 ,) R ( 1s 1 , 2s 2 , 2p

Silver metal, what are the equations for Extraction of Ag from argentiferro...

what are the equations for Extraction of Ag from argentiferrous lead ?

Ph titration, computer program in ph titration

computer program in ph titration

Polymers, giving correct formulas give the reactantsand products in the for...

giving correct formulas give the reactantsand products in the formation of poly2 butane

Inner Transition Elements, Why are they (Lanthanides and Actinides) called ...

Why are they (Lanthanides and Actinides) called Inner Transition Elements?

Explain the phase diagrams - ternary systems, Explain the Phase Diagrams - ...

Explain the Phase Diagrams - Ternary Systems? A ternary system is one with three components. We can independently vary the temperature, the pressure, and two independent compos

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