Q.

In an amino acid, the carboxyl group ionizes at pKa  1=2.34  and ammonium ion at pKa  2=9.60.  The isoelectric point of the amino acid is at pH

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a

5.97

b

2.34

c

9.60

d

6.97

answer is A.

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Detailed Solution

Isoelectric point (pH) =pKa 1+pKa 22=2.34+9.602=5.97
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