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Ionic Concentrations and Activities in Soil Solutions
Author(s) -
Adams Fred
Publication year - 1971
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/sssaj1971.03615995003500030028x
Subject(s) - ionic bonding , ion , electrolyte , dissociation (chemistry) , activity coefficient , hydrolysis , chemistry , inorganic chemistry , strong electrolyte , thermodynamics , physics , organic chemistry , aqueous solution , electrode
The chemical composition of displaced soil solutions is used to illustrate the procedure for correcting measured ionic concentrations to actual ionic concentrations and ionic activities. The procedure distributes soil‐solution electrolytes at equilibrium among their various ionic species by using equations for ion‐activity coefficients, ion‐pair dissociation, weak‐acid and weak‐base dissociation, and hydrolysis. More than a score of related equations had to be solved simultaneously; thus, mathematical solution was effected through the method of successive approximation. Rapid correction of soil‐solution analytical data to actual concentrations and activities of individual soil‐solution ions was made possible by using computer program.