THE EFFECT OF PRESSURE ON THE DISSOCIATION OF LANTHANUM FERRICYANIDE ION PAIRS IN WATER

Journal Article · Sat Feb 01 04:00:00 EST 1964 · Journal of Physical Chemistry (U.S.)

DOI:https://doi.org/10.1021/j100784a029· OSTI ID:4116327

Hamann, S D; Pearce, P J; Strauss, W

Conductometric measurements of the influence of pressure on the molal dissociation constant K/sub m/ of lanthanum ferricyanide ion pairs in water at 25 deg C are described. The value of K/sub m/ increases by a factor of 1.7 between 1 and 2000 atm, and the initial trend corresponds to a change in partial molar volume of --8.0 cm/sup 3//mole for dissociation at 1 atm. The results agree quite well with the predictions of the ion-association theories of Bjerrum and of Fuoss, if it is assumed that the contact distance, a, is independent of pressure and that the change of K/sub m/ arises only from the increases in dielectric constant and density that occur when water is compressed. (auth)

• Research Organization: Commonwealth Scientific and Industrial Research Organization, Melbourne; Univ. of Melbourne
• Sponsoring Organization: USDOE
• NSA Number: NSA-18-012090
• OSTI ID: 4116327
• Journal Information: Journal of Physical Chemistry (U.S.), Journal Name: Journal of Physical Chemistry (U.S.) Vol. Vol: 68; ISSN JPCHA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CHEMISTRY
CYANIDES
DECOMPOSITION
DENSITY
DIELECTRICS
ELECTRIC CONDUCTIVITY
IONS
IRON COMPLEXES
LANTHANUM COMPLEXES
MEASURED VALUES
PRESSURE
QUALITATIVE ANALYSIS
TEMPERATURE
VARIATIONS
WATER