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Q.

In an amino acid, the carboxyl group ionizes at pKa1=2.34  and ammonium ion at pKa2=9.60.  The isoelectric point of the amino acid is at pH

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a

6.97

b

9.60

c

5.97

d

2.34

answer is A.

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Detailed Solution

Isoelectric point (pH)

=pKa1+pKa22=2.34+9.602=5.97

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