Determination of carboxylic acid dissociation constants to 350°C at 23 MPa by potentiometric pH measurements

Kiwamu Sue, Fumiaki Ouchi, Kimitaka Minami, Kunio Arai

    研究成果: Article査読

    24 被引用数 (Scopus)

    抄録

    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.

    本文言語English
    ページ(範囲)1359-1363
    ページ数5
    ジャーナルJournal of Chemical and Engineering Data
    49
    5
    DOI
    出版ステータスPublished - 2004 9月 1

    ASJC Scopus subject areas

    • 化学 (全般)
    • 化学工学(全般)

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