In this master thesis, mean activity coefficients of NaBr in aqueous solution and in solution of polyelectrolytes was determined. 4,5-ionene bromide and 6,12-ionene bromide were used as polyelectrolytes. Mean activity coefficients were determined experimentally, by measuring voltage of a galvanic cell, and theoretically, using Ornstein-Zernike integral equation with HNC (hypernatted chain) closure. Theory describes mean activity coefficients of NaBr in aqueous solutions well, but poorly describes mean activity coefficients of NaBr in solutions of polyelectrolytes.
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