Abstract
The transference number of the ammonium ion in iodide solutions in liquid ammonia at –40 °C (t+°= 0·3957) is found to be almost independent of the concentration.The mean molal ion activity coefficients for ammonium iodide solutions at –40 °C have been determined over a range of concentrations (10–3–10–1 molal) and correspond closely to those previously obtained for ammonium nitrate solutions in liquid ammonia. This indicates a high degree of similarity of behaviour between these species when dissolved in liquid ammonia.The similarity in the activity relationships between ammonium nitrate and iodide solutions in liquid ammonia and 2:2 electrolytes in aqueous solutions is also discussed.
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