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Amino Acids

In an amino a...

Question

In an amino acid, the carboxyl group ionizes at $p K a_{1} = 2.34$ and ammonium ion at $p K a_{2} = 9.6$ . The isoelectric point of the amino acid is at pH.

A

5.97

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B

2.34

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C

9.60

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D

6.97

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Solution

The correct option is A
5.97

pH at Isoelectric point will be $\frac{p K a_{1} + p K a_{2}}{2}$ $= \frac{2.34 + 9.6}{2} = 5.97$

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