Soaps And Candles
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The total uncombined alkali is calculated therefrom, and deducted from the total alkali * " Chem. News, " January 5, 1877; UKE'S "Dictionary, " iv. 822.
190 SOAPS.
already found. Thus the combined and unconibined alkali are determined. (This method is less reliable than the alcoholic treatment, pp. 182 and 187. ) 3. Fatty Acids. 50 c. C. Of the solution are introduced into a stoppered separating funnel, decomposed with excess of acid, and agitated with carbon disulphide until the liberated fatt...y acids are dissolved. The disulphide solution is then drawn off into a tared flask, and the aqueous solution is washed once or twice with small portions of disulphide, and the washings are added to the contents of the flask. The disulphide is then distilled or evaporated off. The fatty acids are purified from the last traces of carbon di- sulphide by heating the flask for a short time at 100 C. After cooling, the weight, less the tare of the flask, gives the weight of the fatty acids.
Ether may be used instead of CS 2, but there is this dis- advantage, that in the separator it will form the upper layer, whereas carbon disulphide forms the lower, and hence is more readily manipulated.
What to read after Soaps And Candles?
You can find similar books in the "Read Also" column, or choose other free books by James Cameron to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The total uncombined alkali is calculated therefrom, and deducted from the total alkali * " Chem. News, " January 5, 1877; UKE'S "Dictionary, " iv. 822.
190 SOAPS.
already found. Thus the combined and unconibined alkali are determined. (This method is less reliable than the alcoholic treatment, pp. 182 and 187. ) 3. Fatty Acids. 50 c. C. Of the solution are introduced into a stoppered separating funnel, decomposed with excess of acid, and agitated with carbon disulphide until the liberated fatt...y acids are dissolved. The disulphide solution is then drawn off into a tared flask, and the aqueous solution is washed once or twice with small portions of disulphide, and the washings are added to the contents of the flask. The disulphide is then distilled or evaporated off. The fatty acids are purified from the last traces of carbon di- sulphide by heating the flask for a short time at 100 C. After cooling, the weight, less the tare of the flask, gives the weight of the fatty acids.
Ether may be used instead of CS 2, but there is this dis- advantage, that in the separator it will form the upper layer, whereas carbon disulphide forms the lower, and hence is more readily manipulated.
What to read after Soaps And Candles?
You can find similar books in the "Read Also" column, or choose other free books by James Cameron to read onlineMoreLess
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