引用本文:
曾英, 唐明林, 殷辉安. 四元交互体系Li+,Na+//CO32-,B4O72--H2O 298K相关系的理论预测及实验研究[J]. 应用化学,
2001, 18(10): 794-797.
Citation: ZENG Ying, TANG Ming-Lin, YIN Hui-An. Prediction and Experimental Verification of Phase Equilibrium in the Quaternary System Li+,Na+//CO32-,B4O72--H2O at 298 K[J]. Chinese Journal of Applied Chemistry, 2001, 18(10): 794-797.
Citation: ZENG Ying, TANG Ming-Lin, YIN Hui-An. Prediction and Experimental Verification of Phase Equilibrium in the Quaternary System Li+,Na+//CO32-,B4O72--H2O at 298 K[J]. Chinese Journal of Applied Chemistry, 2001, 18(10): 794-797.
四元交互体系Li+,Na+//CO32-,B4O72--H2O 298K相关系的理论预测及实验研究
摘要:
采用三元体系的溶解度数据,运用多元线性回归法拟合了Li2CO3(a),Na2CO3(b),Li2B7O7(c)的单盐参数、溶解平衡常数及有关的混合离子作用参数.它们的值分别为:Ua(0)=-1.2355,Ua(1)=-2.6546,CaO=-0.0046607,Ub(0)=-3.0306,Ub(1)=-3.0238,CbO=-0.29089,Uc(0)=-0.29304,Uc(1)=2.1556,CcO=-0.0042560,θLi,Na=1.0418,θB,C=-2.6305,JLi,Na,C=-0.06391,JLi,Na,B=0.49356,JLi,B,C=-0.47842,JNa,B,C=0.30616,lnK(Li2CO3)=-8.9629,lnK(Na2CO3·10H2O)=3.0646,lnK(Li2B4O7·3H2O)=-7.3566,lnK(Na2B4O7·10H2O)=-7.4778.以盐的溶解平衡常数为判据,运用Pitzer方程计算了四元体系Li+,Na+//CO32-,B4O72--H2O 298K时的溶解度,并采用等温溶解平衡法,对该体系298K时溶解度进行了实验测定,同计算值相比,二者基本吻合.
-
关键词:
- Li+
- / Na+//CO32-
- / B4O72--H2O体系
- / 溶解度
- / 预测
English
Prediction and Experimental Verification of Phase Equilibrium in the Quaternary System Li+,Na+//CO32-,B4O72--H2O at 298 K
Abstract:
Based on the solubility data of ternary systems, the single salt parameters and the solu bility product of Li2CO3(a), Li2B4O7(b) and Na2CO3(c), and the corresponding mixing parameters have been fitted by the multiple linear regression method. Their values are:Ua(0)=-1.235 5,Ua(1)=-2.654 6, CaO=-0.004 660 7, Ub(0)=-3.030 6, Ub(1)=-3.023 8, CbO=-0.290 89, Uc(0)=-0.293 04,Ua(1)=2.155 6, CcO=-0.004 256 0, θLi,Na=1.041 8, θB,C=-2.630 5, JLi,Na,C=-0.063 910,JLi,Na,B=0.493 56,JLi,B,C=-0.478 42, JNa,B,C=0.306 16, ln K (Li2CO3)=-8.962 9, ln K (Na2CO3·10H2O)=3.064 6, ln K (Li2B4O7·3H2O)=-7.356 6, ln K (Na2B4O7·10H2O)=-7.477 8. The predicted solubility values of the quaternary system Li+,Na+//CO32-, B4O72--H2O at 298 K are in good agreement with experimental results obtained from a isothermal method at 298 K.
-
Key words:
- Li+
- / Na+//CO32-
- / B4O72--H2O system
- / solubility
- / prediction
-
-
扫一扫看文章
计量
- PDF下载量: 0
- 文章访问数: 0
- HTML全文浏览量: 0
下载:
