首页> 外文期刊>Zeitschrift fur Naturforschung. A, A journal of physical sciences >Solid-Solute Phase Equilibria in Aqueous Solutions Ⅸ. Thermodynamic Analysis of Solubility Measurements: La(OH)_m(CO_3)_q ·rH_2O
【24h】

Solid-Solute Phase Equilibria in Aqueous Solutions Ⅸ. Thermodynamic Analysis of Solubility Measurements: La(OH)_m(CO_3)_q ·rH_2O

机译:水溶液中的固溶相平衡Ⅸ。溶解度测量值的热力学分析:La(OH)_m(CO_3)_q·rH_2O

获取原文
获取原文并翻译 | 示例
           

摘要

The aqueous solubilities of La(OH)_(0.8)(CO_3)_(1.1) ·0.1 H_2O, basic lanthanum carbonate of ancylite type, have been investigated as a function of ionic strength at 25.0℃. The stoichiometric solubility constants defined by log~*K_(ps0)~Ⅰ =log[La~(3+)] + 1.1 log p_(CO_2) - 3 1og [H~+] have the values 11.10, 11.32, 11.42, 11.63, and 11.70 for Ⅰ = 0.1, 0.25, 1.0, 2.0, and 4.0 mol kg~(-1) (Na)ClO_4 respectively. The extrapolation to infinite dilution using the Pitzer equations resulted in a "thermodynamic" solubility constant, log~* K_(pz0)~0 = 10.48 ± 0.08. This in turn led to the Gibbs energy of ancylite formation: Δ_f G_(298)~(direct-) {La(OH)_(0.8)(CO_3)_(1.1) • 0.1 H_2O} = - 1.531.5 kJ mol~(-1).
机译:研究了蓝宝石型碱性碳酸镧La(OH)_(0.8)(CO_3)_(1.1)·0.1 H_2O的水溶解度与离子强度在25.0℃下的关系。由log〜* K_(ps0)〜Ⅰ= log [La〜(3+)] + 1.1 log p_(CO_2)-3 1og [H〜+]定义的化学计量溶解度常数的值分别为11.10、11.32、11.42、11.63 Ⅰ= 0.1、0.25、1.0、2.0和4.0 mol kg〜(-1)(Na)ClO_4分别为11.70和11.70。使用Pitzer方程式外推至无限稀释导致“热力学”溶解度常数log〜* K_(pz0)〜0 = 10.48±0.08。这进而导致了形成橄榄石的吉布斯能量:Δ_fG_(298)〜(direct-){La(OH)_(0.8)(CO_3)_(1.1)•0.1 H_2O} =-1.53​​1.5 kJ mol〜 (-1)。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号