(1) The electromotive forces of the concentration cells with ternary electrolytes were studied by the three methods. (a) At anion reversible cell with mercury electrode. (b) At anion reversible cell with silver electrode. (c) At the cation reversible cell with amalgam electrode. (2) Several equations were theoretically obtained to calculate the electromotive forces of the cells above mentioned. (3) Mobilities at 30°C. and activity coefficients of chlorine, zinc, calcium, barium, strontium and magnesium ions were calculated. (4) We had a very good agreement between measured electromotive forces and calculated ones in the very dilute solutions.
1. The method of purification of alizarin is proposed. 2. A deep orange, hydrophile colloidal substance is produced when alizarin is added into an aqueous solution of sodium aluminate. The mechanism of the reaction may be as follows; (Remark: Graphics omitted.) And the constitutional formula will be (Remark: Graphics omitted.)
(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.