# Problem: Ascorbic acid, H2C6H6­O6, is a common diprotic acid with a Ka1 = 8.0 x 10 -5 and Ka2 = 1.6 x 10 -12.a. What are the three forms of the diprotic acid?   b. What is the principal species at pH = 2.00?  c. What is the principal species at pH = 6.10?  d. What is the principal species at 13.80?  e. What is the second most prominent species at pH = 8.10?  f. At what pH is [H2C6H6­O6] = [HC6H6­O6 - ]?  g. At what pH is [HC6H6­O6 - ] = [C6H6­O62 - ]?

###### Problem Details

Ascorbic acid, H2C6HO6, is a common diprotic acid with a Ka1 = 8.0 x 10 -5 and Ka2 = 1.6 x 10 -12.

a. What are the three forms of the diprotic acid?

b. What is the principal species at pH = 2.00?

c. What is the principal species at pH = 6.10?

d. What is the principal species at 13.80?

e. What is the second most prominent species at pH = 8.10?

f. At what pH is [H2C6HO6] = [HC6HO6 - ]?

g. At what pH is [HC6HO6 - ] = [C6HO62 - ]?

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Diprotic Acid concept. You can view video lessons to learn Diprotic Acid. Or if you need more Diprotic Acid practice, you can also practice Diprotic Acid practice problems.

What is the difficulty of this problem?

Our tutors rated the difficulty ofAscorbic acid, H2C6H6­O6, is a common diprotic acid with a K...as high difficulty.

How long does this problem take to solve?

Our expert Chemistry tutor, Jules took 9 minutes and 23 seconds to solve this problem. You can follow their steps in the video explanation above.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Zhang's class at CSU CHICO.