Talk:Periodate

"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)

[1] 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

[2] 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)

[3] 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)

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