Abstract
The mean ionic activity coefficients of NaBr in aqueous mixtures of NaBr and Ca(NO3)2 were determined at 25°C at a total ionic strenghth of 3, 4.5 and 6 molal. The measurements were made using an electrochemical cell with the ion-selective electrodes (ISE), Na-ISE against Br-ISE as a reference electrode. The experimental mean activity coefficients of NaBr obey Harned's Rule. The mean activity coefficients of Ca(NO3)2 were calculated using the cross differentiation of the mean activity coefficients.
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Haghtalab, A., Vera, J.H. Mean activity coefficients at 25°C for NaBr−Ca(NO3)2−H2O mixtures, a ternary system without a common ion. J Solution Chem 20, 479–493 (1991). https://doi.org/10.1007/BF00650804
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DOI: https://doi.org/10.1007/BF00650804