论文部分内容阅读
本文用极谱法证明碘离子和镉离子在水溶液中生成配值数自1到6的六种络合物,其各级稳定常数,在以高氯酸钠为维持溶液离子强度的惰性支持电解质时,在25℃时,K_1=40.74±0.4,K_2=(3.72±0.12)×10~2,K_3=(2.95±0.02)×10~4,K_4=(2.37±0.07)×10~5,K_5=(1.04±0.10)×10~5,K_6=(3.70±0.10)×10~4.同时也测定了在18℃和30℃时的各级稳定常数.并计算了在不同配位体浓度时溶液中各种络离子的百分组成,??值和热力学函数(热函,熵和自由能的改变).
Polarographic methods were used to prove that iodide and cadmium ions produced six complexes with an order number from 1 to 6 in aqueous solution. The stability constants at all levels were determined by polarographic method. In the presence of sodium perchlorate as inert support electrolyte , K 2 = (3.72 ± 0.12) × 10 -2, K 3 = (2.95 ± 0.02) × 10 -4, K 4 = (2.37 ± 0.07) × 10 -5, K 5 at 25 ℃ = (1.04 ± 0.10) × 10 ~ 5, K_6 = (3.70 ± 0.10) × 10 ~ 4.At the same time, the stability constants at various levels at 18 ℃ and 30 ℃ were also calculated.At the same time, The percent composition, values and thermodynamic functions (enthalpy, entropy and free energy) of various complex ions in solution.