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Predicting Specific Conductance from Electrolytic Properties and Ion Association in Some Aqueous Solutions
Author(s) -
Tanji K. K.
Publication year - 1969
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1969.03615995003300060026x
Subject(s) - conductance , electrolyte , ion association , aqueous solution , limiting , chemistry , conductivity , ion , strong electrolyte , relaxation (psychology) , chloride , ionic bonding , inorganic chemistry , thermodynamics , electrical resistivity and conductivity , ionic conductivity , analytical chemistry (journal) , chromatography , physics , condensed matter physics , mechanical engineering , psychology , social psychology , organic chemistry , electrode , engineering , quantum mechanics
Specific conductances in aqueous solutions of electrolytes up to 0.1 N concentration were predicted with an extended form of the Onsager limiting equation and compared with measured values. For completely dissociated chloride solutions the calculations involved ionic conductance, electrophoretic and relaxation effects, and other electrolytic properties. Incompletely dissociated sulfate solutions required additional considerations of ion association of NaSO 4 ‐ , CaSO 4 °, and MgSO 4 °. Agreement was good between predicted and accepted literature conductance values. This quantitative description of conductance provides a theoretical explanation of why electrical conductivity underestimates analytically determined solute concentrations in waters and soil solutions containing moderate concentrations of SO 4 2‐ .