Activity coefficients for NaCl in N,N-dimethylformamide + water mixtures containing 5, 7.5, 10, 15, 30, and 45 mass % DMF have been determined at 25 °C by emf measurements. A decrease of the activity coefficient for NaCl with the DMF increase in the mixture is observed. The activity coefficients at the concentration 0.10 mol‚kg -1 have been correlated with those reported in the literature for other DMF compositions.
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