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
I've followed WP:SECONDARY regarding the pKa values. However, somewhat oddly I can't find any primary research which backs them up. Instead primary literature gives a different pKa range, shown below. 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.