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Activity coefficients of counterions in solutions of diethylaminoethyl dextran hydrochloride

✍ Scribed by F. Gubenšek; S. Lapanje

Publisher
Wiley (John Wiley & Sons)
Year
1967
Tongue
English
Weight
422 KB
Volume
5
Category
Article
ISSN
0006-3525

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✦ Synopsis

Activity coefficients of counter ions in solutions of diethylaminoethyl dextran hydrochloride have been determined. I t has been observed that they increase with decreasing concentration of the polyelectrolyte. The experimental values have been compared with those calculated using Oosawa's theory of activity coefficients. The calculated values are higher than those observed, which suggests that the rodlike model on which Oosawa's theory is based is inadequate for the present case. Activity coefficients of counterions of some solutions containing NaCl and KCl, respectively, have also been determined. It has been found that the additivity rule for activity of counterions applies for these solutions.

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✍ C. Rochas; M. Rinaudo 📂 Article 📅 1980 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 496 KB 👁 1 views

## Abstract The optical rotation and the conductivity of kappa‐carrageenans in aqueous solution have been investigated as functions of temperature in the presence of various electrolytes. The activity coefficients of sodium and potassium have been determined and correlated with the conformation. Th