PNNL

Abstract

In the subject paper, Plascak and Shields claim to have derived accurate experimental values for the hydration free energies of H+, OH–, and H3O+. The purpose of this comment is to alert the community that, in fact, their values are less accurate than the values they are meant to replace. In what follows we show the errors PS made and, by example, give practical advice on how to ensure correct assignment of standard states for reactions with water as a reactant or product in gas and solution phases.