MEAN ACTIVITY-COEFFICIENTS IN THE TERNARY NACL-NANO3-H2O AND NABR-NANO3-H2O SYSTEMS AT 298.15-K

被引:53
作者
HAGHTALAB, A [1 ]
VERA, JH [1 ]
机构
[1] MCGILL UNIV,DEPT CHEM ENGN,MONTREAL H3A 2A7,QUEBEC,CANADA
关键词
D O I
10.1021/je00003a022
中图分类号
O414.1 [热力学];
学科分类号
摘要
The mean activity coefficients of NaCl in the NaCl-NaNO3-H2O system and NaBr in the NaBr-NaNO3-H2O system have been measured at 298.15 K over the range of ionic strengths from 0.3 to 6 m. The measurements were made by an electrochemical cell using ion-selective electrodes (ISE). The data were collected with an Orion millivolt (mV) meter, Model EA 920, using Na-ISE against Cl-ISE and Br-ISE as reference electrodes. The experimental mean activity coefficients of NaCl and NaBr obey Harned's Rule. The mean activity coefficients of NaNO3 were calculated by using the Gibbs-Duhem equation.
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页码:332 / 340
页数:9
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