(a) Compare the oxidation number of manganese in MnO with that in Mn2O3. The oxi

Question

(a) Compare the oxidation number of manganese in MnO with that in Mn2O3.
The oxidation number of manganese in MnO is?and in Mn2O3 is?
(b) What is the change in oxidation number of sulfur when the dithionite anion, S2O42, is converted to SO2 in an oxidation-reduction reaction? Does each sulfur atom gain or lose electrons in the reaction? Is sulfur oxidized or reduced in the reaction?
The oxidation number of each S atom is(....?)in S2O42 and (..?)Thus, each sulfur atom looses(...?)electrons in the reacton

(...?)= where answer is needed

Explanation / Answer

A) oxidation number of manganese in MnO is +2.

Oxidation number of manganese in Mn2O3 is +3.

So change is 1 unit.

B) in S2O4^2- the oxidation number of sulphur atom is:-

Average:-+3,each sulphur atom:-+4,+2

In SO2 the oxidation number of Sulphur atom is +4.

So loss of 2 electron

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