TY - JOUR
T1 - Reconciling Measurement and Prediction of Free and Solvated Water in Solution
AU - Wexler, Anthony S.
AU - Patel, Kunal
AU - Gen, Masao
AU - Chan, Chak K.
N1 - Funding Information:
A.S.W. would like to thank Simon Clegg, University of East Anglia, for his valuable guidance. C.K.C. would like to acknowledge the Hong Kong Research Grants Council (grant #11302318) for their support.
Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/4/21
Y1 - 2020/4/21
N2 - In 2019, Wexler showed that, by applying Raoult's law rigorously to aqueous solutions and properly accounting for hydration of solutes, equations can be derived that accurately describe solute and solvent activity over the full range of concentrations from infinitely dilute to pure solutes. One feature of this theory is that it also predicts the amount of water that is free and the amount that is bound to the solute. In 2004 and 2005, Choi and co-workers used an electrodynamic balance to measure (i) the concentration of a range of organic and electrolyte solutes as a function of water activity and (ii) the amount of free and bound water in these solutions using the fluorescence of pyranine as a probe. In the current work, we compare the predictions of Wexler's theory to the measurements of Choi. After the adjustments to the amount of free water obtained by these measurements, the predictions of Wexler's theory match the measurements of Choi. The potential reasons for the adjustments are discussed.
AB - In 2019, Wexler showed that, by applying Raoult's law rigorously to aqueous solutions and properly accounting for hydration of solutes, equations can be derived that accurately describe solute and solvent activity over the full range of concentrations from infinitely dilute to pure solutes. One feature of this theory is that it also predicts the amount of water that is free and the amount that is bound to the solute. In 2004 and 2005, Choi and co-workers used an electrodynamic balance to measure (i) the concentration of a range of organic and electrolyte solutes as a function of water activity and (ii) the amount of free and bound water in these solutions using the fluorescence of pyranine as a probe. In the current work, we compare the predictions of Wexler's theory to the measurements of Choi. After the adjustments to the amount of free water obtained by these measurements, the predictions of Wexler's theory match the measurements of Choi. The potential reasons for the adjustments are discussed.
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U2 - 10.1021/acsomega.0c00311
DO - 10.1021/acsomega.0c00311
M3 - Article
AN - SCOPUS:85083189622
SN - 2470-1343
VL - 5
SP - 8754
EP - 8765
JO - ACS Omega
JF - ACS Omega
IS - 15
ER -