Find more information about Crossref citation counts. The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric. Find more information on the Altmetric Attention Score and how the score is calculated. View Author Information. Cite this: J. Article Views Altmetric -. Citations Cited By. This article is cited by 25 publications.
Sharon Priya Gnanasekar, Elangannan Arunan. The Journal of Physical Chemistry A , 33 , Evans, Cassandra L. Ward, Charles H. Organometallics , 40 9 , Brydon, Benjamin L. Harris, Jonathan M. The Journal of Organic Chemistry , 86 5 , Stadler, Thierry Delatour. Journal of Agricultural and Food Chemistry , 68 29 , Improve this question. Advil Sell Advil Sell 1 1 gold badge 7 7 silver badges 20 20 bronze badges. I glanced through it and it seems to try to explain where this discrepancy comes from.
The difference between values is in the 'standard states' used. The normal thermodynamic one is to use the pure solvent water as the standard state, effectively this means, via the activity, replacing water concentration with 1 in the equilibrium constant equation.
From page 20 in the paper you quote is a summary of how we do this. The Add a comment. Active Oldest Votes. Improve this answer. In the paper, they mention that Inselino Inselino 2 2 silver badges 9 9 bronze badges. There might be minor cases where water is a reactant where it has a higher pKa but usally it is considered Sign up or log in Sign up using Google.
The proposed value of 1. In fact, 1. There is no reason to use this value. Two Values for the Same Equilibrium Constant? This is false. The sum of the two water concentrations must be This is an absurd assertion.
Activity is not merely a convention. It is a description of the potential for a chemical species to react. The fact that these two reactions are equivalent is absolutely dependent upon the fact that all of the water molecules are identical. For Further Consideration: Dissociation Constant of Methanol The great irony behind all of this discussion is that the Ballinger and Long 5 paper not only presents data that clearly show that methanol is a weaker acid than water in aqueous solution, but also employs the value of Conclusions There would be little or no confusion in this matter if it were made clear from the outset that solvents can affect the relative acidity of compounds.
References Meister, E. Acta , 97, 1. Silverstein, T. Marshall, W. Data , , 10, Bandura, A. Data , , 35, Ballinger, P. Hine, J. Cox, B. Note: Even though the author clearly describes solvent effects, he, too, follows the incorrect convention of including concentrations in calculating K values.
0コメント