microcalorimetric titration
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2006 ◽  
Vol 94 (9-11) ◽  
Author(s):  
Hiroyuki Kitano ◽  
Yuko Onishi ◽  
Akira Kirishima ◽  
Nobuaki Sato ◽  
Osamu Tochiyama

Potentiometric and microcalorimetric titration techniques were applied to determine the Gibbs free energies and enthalpies of the protonation of some carboxylic acids (acetic, glycolic, malonic and malic acids) and their complexation with Eu(III) in 1.0 M NaClOA few to several kJ/mol of enthalpies were determined for the reactions within the uncertainties of ±0.01 to ±0.4. These enthalpy values indicated that the protonation of these carboxylates were entropy-driven, that is, |−


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