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Enthalpies of reaction of calcium chloride and sodium oxalate in aqueous solution of Tween 80

The heats of mixing of dilute calcium chloride and sodium oxalate solutions in water and aqueous solutions of a nonionogenic surfactant, namely, polyoxyethylene (20) sorbitan monooleate (Tween 80) containing 1-5 wt % of the dissolved substance were measured at 298.15 K. The heats of dilution of calc...

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Bibliographic Details
Published in:Russian journal of inorganic chemistry 2011, Vol.56 (1), p.139-140
Main Authors: Berezin, M. B, Kustov, A. V, Smirnova, N. L, Trostin, V. N
Format: Article
Language:English
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Summary:The heats of mixing of dilute calcium chloride and sodium oxalate solutions in water and aqueous solutions of a nonionogenic surfactant, namely, polyoxyethylene (20) sorbitan monooleate (Tween 80) containing 1-5 wt % of the dissolved substance were measured at 298.15 K. The heats of dilution of calcium chloride solutions were determined, and the enthalpies of precipitation of calcium oxalate in water and surfactant solutions were calculated. The surfactant concentration was found to have almost no effect on the enthalpies of the processes under study; rather, it modifies the shape of the resultant deposit by preventing the agglomeration of calcium oxalate particles.
ISSN:0036-0236
1531-8613
DOI:10.1134/S0036023611010049