Reaction of Selenious Acid with Potassium Permanganate

ALTHOUGH the reaction of selenious acid with potassium permanganate has been used in estimating selenium 1–3 it has not been investigated in detail. According to Charlot 4 selenious acid reduces permanganate to manganese dioxide, which separates from the solution. But it is observed that when potass...

Full description

Saved in:
Bibliographic Details
Published in:Nature (London) 1965-01, Vol.207 (4993), p.187-187
Main Authors: KESHAVA, K., HALDAR, B. C.
Format: Article
Language:English
Subjects:
Humanities and Social Sciences
letter
multidisciplinary
Science
Science (multidisciplinary)
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:ALTHOUGH the reaction of selenious acid with potassium permanganate has been used in estimating selenium 1–3 it has not been investigated in detail. According to Charlot 4 selenious acid reduces permanganate to manganese dioxide, which separates from the solution. But it is observed that when potassium permanganate is added to a large excess of selenious acid solution, the pink colour due to permanganate is discharged and the formation of precipitates of MnO 2 does not take place. If selenious acid is not in large excess, only the precipitates of MnO 2 appear shortly after the addition of permanganate. This suggests that selenious acid first reduces permanganate ion to manganous ion which reacts with permanganate to form manganese dioxide. In the present investigation the reaction between selenious acid and potassium permanganate has been studied by physico-chemical methods.
ISSN:0028-0836
1476-4687
DOI:10.1038/207187a0