Homework Help: Chem

Posted by Confused on Tuesday, April 22, 2008 at 10:38pm.

Ascorbic acid, H2C6H6O6, is a diprotic acide with a K1= 7.9 E-5 and a K2=1.6E-12. In a .005 M aq solution of ascorbic acid which of the following species is present in the lowest concentration.
1. H2O
2. H3O
3. H2C6H6O6
4. HC6H6O6
5. C6H6O6

Chem - DrBob222, Wednesday, April 23, 2008 at 12:06am
You didn't put charges on what you wrote. The way you work this problem is to write the ionization of the two hydrogens and the k1 and k2 expressions. Then some reasoning ability to see which one is the least. k1 and k2 are given so logic will tell you.

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