Question

Organic question... (pic coming soon) Treat the amine and carboxylic acid functional groups as independent functional groups, estimate:

A) The fraction of the carboxylic acid group (pKa=4.5) that is ionized at pH=7.

B) The fraction of the amine functional group (pKa=9.6) that is protonated at pH=7.

Answer 1

I am confused right off the bat with "fraction." What fraction do you think they are looking for in this question? I used pKa - pH = -log (ratio).
A) 316 = ratio
B) 0.0025 = ratio