MEAN AND SINGLE ION ACTIVITY-COEFFICIENTS OF SODIUM HALIDES IN AQUEOUS SODIUM POLYPHOSPHATE AND SODIUM CARRAGEENAN SOLUTIONS

Chloride, bromide, iodide, and sodium single ion activity coefficients and their mean activity coefficients have been determined in aqueous solutions of sodium polyphosphate and sodium ι-carrageenan at 25°C. For the sodium polyphosphate solutions, 0.00100, 0.00500, and 0.0100 M NaCl, NaBr, and NaI were used and for the sodium ι-carrageenan solutions, 0.00100, 0.00500, and 0.0100 M NaCl, NaBr, and NaI were used. The equivalent concentration ratios of polyelectrolyte to simple salt ranged from 0.10 to 8.0. The experimental results are correlated with those predicted from the limiting laws of Manning and of Iwasa, McQuarrie, and Kwak. © 1978 American Chemical Society.