Wikipedia:Reference desk/Archives/Science/2019 October 29

= October 29 =

Solvation number
Can someone with access to the content of the book Metal ions in solution (1978) by John Burgess verify the chapter 5 of this source to see whether the method mentioned at talk:Solvation shell is also presented among the methods included in this chapter of this source? Thanks!--109.166.131.34 (talk) 20:50, 29 October 2019 (UTC)
 * Chapter 5 lists the values of solvation number as determined by compressibility, in particularly by using ultrasonics. Chapter section 4.3.2 is titled "Compressibilities" says that Passynski's equation is used. However the equation is not given in the book. The equation reference is "Passynski, A. Acta Phys.-chim 8 385 (1938)" which I cannot find. https://doi.org/10.1143/JPSJ.16.761 makes use of this ref and may be relevant. Graeme Bartlett (talk) 22:26, 29 October 2019 (UTC)
 * It appears that the Passynski reference is from a Soviet journal Acta Physico-Chimica URSS which hasn't been digitized being thus available only off-line.--109.166.131.34 (talk) 13:02, 30 October 2019 (UTC)
 * How about the content of the following book Aqueous Solutions of Symple Electrolytes, H. L. Friedman, Felix Franks and especially chapter 1 Ionic hydration? Could it contain details re Passynski equation, including derivation?--109.166.131.34 (talk) 13:13, 30 October 2019 (UTC)
 * I don't have that book, but online it does not mention Passynski's equation. Its talk about compressibility is related to thermodynamics rather than calculating the solvation number. It does have a formula on page 73 in section 4.3.1: summarised as: Isothermal compressibility = -8.307 × charge2 /(Pauli crystal radius + Δ) ml Å bar−1 mol−1 ; Δ is some sort of length measurement of the solvation sphere, and can be 0 Å. Graeme Bartlett (talk) 23:23, 30 October 2019 (UTC)