DISSOCIATION-CONSTANT OF BISULFATE ION IN AQUEOUS SODIUM-CHLORIDE SOLUTIONS TO 250-DEGREES-C

被引:202
作者
DICKSON, AG
WESOLOWSKI, DJ
PALMER, DA
MESMER, RE
机构
[1] OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831
[2] UNIV CALIF SAN DIEGO,SCRIPPS INST OCEANOG,MARINE PHYS LAB,LA JOLLA,CA 92093
关键词
D O I
10.1021/j100383a042
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The molal equilibrium quotients for the protolytic dissociation of bisulfate ion (HSO4-) were measured potentiometrically in aqueous sodium chloride media by using a hydrogen-electrode concentration cell with liquid junction. The ionic strength was varied from 0.1 to 5.0 mol kg-1 at temperatures ranging from 50 to 250°C. Equilibrium quotients obtained from the measured potentials were combined with published values of the corresponding equilibrium constants, enthalpy, and heat capacity changes at infinite dilution and ambient temperatures, and fitted to an empirical equation containing the Pitzer form of the extended Debye-Hückel term and nine adjustable parameters. © 1990 American Chemical Society.
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页码:7978 / 7985
页数:8
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