Ascorbic acid (C6H8O6) has how many acidic protons that it will lose when reacting with NaOH?

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Ascorbic acid (C6H8O6) has how many acidic protons that it will lose when reacting with NaOH?

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Answer 1 · 2017-10-01T02:02:10

Hard to say...

I would say only one (with $K_(a1) = 7.9 xx 10^(-5)$ ), from looking at its structure... perhaps two if you really cared for a $K_(a2)$ of only $1.6 xx 10^(-12)$ . If you really slammed it with $"NaOH"$ , you would eventually abstract that second proton, but it would take a while.

![https://upload.wikimedia.org/]( useruploads.socratic.org )

[Carbonic acid is considered diprotic and its second $K_a$ is an order of magnitude larger than the second $K_a$ of ascorbic acid.]

[More $K_a$ s can be found here.](http://www2.ucdsb.on.ca/tiss/stretton/database/polyprotic_acids.htm)

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Ascorbic acid (C6H8O6) has how many acidic protons that it will lose when reacting with NaOH?

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