pKA=pH when:
Solute is completely ionised
When the concentration of ionised and unionized form is same
Solute is completely unionized
All of the above
Ans. B. When the concentration of ionized and unionized form is sameThis question is an application of Henderson Hasselbalch equation.It ispH=pKa+log/ is concentration of ionised form is concentration of unionised form.When =, thenpH=pKa+log/pH=pKa+log1i.e.pH=pKa+0
Proteins and Amino Acids