01555nas a2200217   4500008004100000022001400041245010400055210006900159260007300228300001200301490000800313520076100321653001601082653001701098653002701115653001801142653001801160653001801178100001601196856012501212       2005                        eng d  a0040-603100aPressure dependence of the dissociation of acetic, benzoic, mandelic and succinic acids at 298.15 K0 aPressure dependence of the dissociation of acetic benzoic mandel  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcDEC  a154-1570 v4393 a<p>Dissociation constants for acetic, benzoic, mandelic and succinic acids have been measured at 298.15 K as a function of pressure up to 138.8 MPa. The spectrophotometric technique using Bromocresol Green as the optical indicator was employed up to ionic strength of 0.03 mol kg(-1) in aqueous solution. Thermodynamic dissociation constants were calculated with the Davies activity coefficient equation. The pressure dependences of the ionization constants for the weak acids can be described by the equation of Lown, Thirsk and Wynne-Jones, application of which leads to accurate partial molal volume change on ionization, Delta(V) over bar (o) and compressibility change, Delta(K) over bar (o) at 0.1 MPa. (C) 2005 Elsevier B.V. All rights reserved.</p>10aAcetic acid10abenzoic acid10adissociation constants10ahigh pressure10amandelic acid10asuccinic acid1 aKumar, Anil  uhttps://library.ncl.res.in/content/pressure-dependence-dissociation-acetic-benzoic-mandelic-and-succinic-acids-29815-k-0