Author:
Schwabe K,Hoffmann W,Queck C
Abstract
The comparison of S2ΔS1G°tr(E1) with the sum of the values for the corresponding cation and anion
S2ΔS1G°tr(Ct+)~S2ΔS1G°tr(X-) (measured) with Owen cells, gained by double extrapolation and by
the assumption that the liquid junction potential at 1→0 may be neglected) gives values which differ
by not more than ±5%. Most of the investigated acids allow the conclusion that the pH values,
measured in cells with transference, and having the same electrodes, give good information on the
acidity of the organic solvent and its water mixtures, referred to the standard state in water. That
means that the pH, changed to the same H+ concentration in the solvent compared with that in
water, is essentially an effect of the free energy of transfer of the hydrogen ion and not of very high
liquid junction potentials.
Cited by
2 articles.
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