F. A. Gooch, C. Clemons
Jul 1, 1895
Citations
0
Influential Citations
5
Citations
Journal
American Journal of Science
Abstract
THE fact that sulphurouil and tellurous acids may be oxidized quantitatively by a sufficient excess of potassium permanganate suggests naturally the application of the same general method to the determination of selenious acid. It is the object of this paper to record the results of experiments in this direction. Brauner* found that in the action of the perlllanganate upon tellurous acid, whether in a solution acidified with sulphuric acid or made alkaline by caustic soda, the reduction of the permanganate does not proceed to the lowest degree of oxidation, the tellurous acid being unable to reduce the higher hydroxides of manganese which separate. In employing the reaction quantitatively it is necessary, therefore, to add the permanga· nate in distinct excel:'s and then to destroy the surplus by means