Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
THE RATE OF OXIDATION OF STANNOUS SALT BY OXYGEN AND THE ELECTRICAL CONDUCTIVITY OF MIXTURES OF SULPHURIC ACID AND STANNOUS SULPHATE
Susumu Miyamoto
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1932 Volume 7 Issue 2 Pages 56-68

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Abstract

(1) The effects of sodium hydroxide, sodium carbonate, hydrochloric acid and sulphuric acid on the rate of oxidation of stannous salt solution by air were described.
(2) The specific conductance of sulphuric acid solution containing stannous sulphate was observed. When the concentration of sulphuric acid is less than about 0.6 normal, specific conductance of the mixture increases with the increase of concentration of stannous sulphate and when the concentration of sulphuric acid is greater than about 1 normal, the specific conductance of the mixture decreases with the increase of concentration of stannous sulphate. The assumption, that two kinds of molecular complexes are formed in the solution, was proposed for the interpretation of the result, and as the most probable molecular complexes, H2Sn2(SO4)3 and H2Sn(SO4)2 were mentioned.
(3) The assumptions, that the rate of oxidation of stannous salt itself by oxygen is extremely small, and that the rate of oxidation increases as a result of the formation of some complex compounds in the solution, were proposed. The assumptions were applied for the interpretation of the effect of sodium hydroxide, sodium carbonate, hydrochloric acid and sulphuric acid on the rate of oxidation of stannous salt solution by air.

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