The dissociation constants of aqueous ethanoic, propanoic, butanoic, pentanoic, and hexanoic acids were
determined in 0.1 mol·kg-1 NaCl media at temperatures from (19.4 to 350.4) °C and 23 MPa by a flow-through electrochemical cell with a pressure-balanced hydrogen platinum electrode. Temperature
dependence of K values shown by each acid were qualitatively similar. The values are consistent with
the literature values determined from potentiometry, calorimetry, and electrical conductivity. An empirical
density model for the description of the temperature dependence of the equilibrium constants was used
to correlate the data.
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