HILTONA. SMITHAND HARVLD TAYLOR
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LLHIGII~ N I V E R b I T Y1
The Solubility Curves of the Systems Carbon Tetrachloride-Branched Chain Alkyl Acids -Water at 25 O HILTON *I.SMITH
HAROLD 'rAVLOK
AND
KCOOH
In an earlier paper' the effect of the length of the carbon chain of normal organic acids on the solubility curves of the systems carbon tetrachloride-n-alkyl acids-water was demonstrated. 'The present paper gives the results of uivestiga tioiis concerning the effect of branched chaiii aci(1s on the solubility curves of similar systems,
Experimental A11 acids used were the best grade of Eastmaii chemicals. C. P. carbon tetrachloride was used without further purification since the solubility of water i n pure carbon tetrachloride is not great enough to affect the results within the limit of experimental error. 4 s in the earlier investigation, the limits of mutual solubility of the three components were determined by titration of mixtures of two of the components with the third until two phases merged into a single phase or, when the two starting components were miscible, until a second phase separated. In the case of acids which were only partially miscible with water, the mutual solubility of each in the other \vas also determined by titration methods.
HsO CC14 Fig. 3.--Solubility curves of the systems CC1,-ChHgCOOH-H?O a t 25 ': C, n-valeric acid; D, isovaleric acid, E, methylethylacetic acid; F, trimethylacetic acid
in Table I. The values represent the maximum mole per cent. of carbon tetrachloride which may be dissolved in the indicated mixtures of acid and water. As in the earlier paper, the solubility of water in carbon tetrachloride and that of carbon TABLE I
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