2. Activities and concentrations
Thermodynamics shows that the potential adopted by an indicator electrode in a potentiometric chain is related to the activity of the electrode. ion to which the electrode responds. Activity, a thermodynamic quantity, is linked to concentration, an experimental quantity, via the activity coefficient by the relation :
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Activities and concentrations
Chemical potential and electrochemical potential
Bibliography
Websites
Organizations
AFNOR Association Française de Normalisation http://www.afnor.org
AFNOR, ASTM, ISO and NIST are organizations that publish national or international standards using defined operating protocols. A number of these standards use direct potentiometry or potentiometric titration.
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