汞阴极法制烧碱的解汞能有可能回收,它决定于钠汞齐在氢氧化钠溶液中的平衡电位,而后者的确定须先知道钠汞齐的标准电极电位ε°(定义见后).钠汞齐在氢氧化钠溶液中的平衡电位较难测定,ε°值亦尚未确定.为此,本文利用前人数据,采用一般化学热力学方法计算5°,15°,25°及35°下ε°的数值,给出ε°与温度的关系式,并以图表示不同温度下不同氢氧化钠溶液浓度中和不同钠汞齐浓度的平衡电位ε的数值.现将结果简 It is possible to recover mercury dissolved in mercury cathode caustic soda, which is determined by the equilibrium potential of sodium amalgam in sodium hydroxide solution. The latter determination must first know the standard electrode potential of sodium amalgam ε ° (as defined below). The equilibrium potential of sodium amalgam in sodium hydroxide solution is more difficult to determine, and the ε ° value has not been determined yet.To sum up, we use the general chemical thermodynamics method to calculate the equilibrium potential at 5 °, 15 °, 25 ° and 35 ° ε °, the relationship between ε ° and temperature is given and the values ​​of the equilibrium potential ε at different sodium hydroxide concentrations at different temperatures and at different concentrations of sodium amalgam are plotted.