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采用徐光宪等的极谱半波电势的方法和作图法,测定铅和醋酸根所成络合物的各级络合常数,在25℃,以高氯酸纳维持离子强度μ=2.5时,测得:K_1=95.5±3.5;K_2=1350±28;K_3=912±18;K_4=501±15。并计算不同浓度醋酸钠溶液中各种络离子的百分组成和热函数与自由能的改变。
Xu Guangxian and other polarographic half-wave potential method and mapping method to determine lead and acetate complexes formed at all levels of the complexation constant at 25 ° C with sodium perchlorate to maintain ionic strength μ = 2.5, K_1 = 95.5 ± 3.5; K_2 = 1350 ± 28; K_3 = 912 ± 18; K_4 = 501 ± 15. The percentage composition of various complex ions and the change of thermal function and free energy in different concentrations of sodium acetate solution were calculated.