Talk:Periodate
Add topic | This article is rated B-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects: | ||||||||||
| |||||||||||
"In neutral or weak acid conditions, IO4− is most common, in equilibrium with a smaller amount of H4IO6−. In basic conditions, H3IO6-− is formed, plus some other ions."
It seems odd to have more hydrogen in basic conditions... To the author: can you explain or give sources?
Notes regarding rework
[edit]I've followed WP:SECONDARY regarding the pKa values. However, somewhat oddly I can't find any primary research which backs them up.[1] Instead primary literature gives a different pKa range, shown below.[2][3] I don't know why the two pKa ranges are so different but I thought I'd note it here.
- H5IO6 ↔ H4IO6− + H+, pKa = 1.64
- H4IO6− ↔ H3IO62− + H+, pKa = 8.36
- H3IO62− ↔ H2IO63− + H+, pKa = 14.98
With regards to metaperiodic acid (HIO4), I can't find a pKa value anywhere, presumably an accurate pKa can't be determined as it hydrates too rapidly in solution.
- ↑ There's some evidence that it might originate from: Chaudhuri, B. K., and H. G. Mukherjee. "REVIEW ON PERIODIC ACIDS AND PERIODATES (SIMPLE AND COMPLEX)." JOURNAL OF THE INDIAN CHEMICAL SOCIETY 56.11 (1979): 1098-1107.
but like anything old from the Indian chemical society it's uterly unobtainable - ↑ Crouthamel, C. E. (1951). "Ionization and Hydration Equilibria of Periodic Acid". Journal of the American Chemical Society. 73 (1): 82–87. doi:10.1021/ja01145a030.
{{cite journal}}: Unknown parameter|coauthors=ignored (|author=suggested) (help); Unknown parameter|month=ignored (help) - ↑ Crouthamel, Carl E. (1949). "Spectrophotometric Studies of Dilute Aqueous Periodate Solutions". Journal of the American Chemical Society. 71 (9): 3031–3035. doi:10.1021/ja01177a026.
{{cite journal}}: Unknown parameter|coauthors=ignored (|author=suggested) (help); Unknown parameter|month=ignored (help)