
TY  - JOUR
A1  - Kratsis, Steven 
A1  - Hefter, Glenn 
A1  - May, Peter M. 
A1  - Sipos, Pal 
T1  - Thermodynamics of Protonation and Sodium Binding of Sulfate in Concentrated NaCl and CsCl Solutions Studied by Raman Spectroscopy
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 2000
VL  - 53
IS  - 5
SP  - 363
EP  - 367
KW  - Caesium chloride; enthalpy; entropy; ion pair; protonation; Raman spectroscopy; sodium chloride; sulfate.
UR  - https://doi.org/10.1071/CH00011 
N2  - The protonation constant (pKa) of SO42&#8211;(aq) has been determined at ionic strengths 0.5 M &#x2264;I &#x2264;4.0 M in NaCl and CsCl media at 25&#x02DA;C by using Raman spectroscopy. These data were used to calculate the association constant of the NaSO4&#8211;(aq) ion pair in CsCl media. The results are in excellent agreement with previous values obtained by other techniques. The (pKa) was also measured at I = 4 M in both media at temperatures up to 85&#x02DA;C and the associated enthalpy and entropy changes were calculated. However, reliable thermodynamic data for the ion-pairing reaction could not be obtained at higher temperatures probably because of competition from CsSO4&#8211;(aq). 
ER  -

