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7.5 gm glycine is added to 500 ml water....

`7.5 gm` glycine is added to `500 ml` water. What is the `pH` of the solution ? (Given: `pK_(a_(1)) ("glycine") = 2.4, pK_(a_(2)) ("glycine") = 9.54` )

A

`6.15`

B

`2.58`

C

`9.58`

D

`5.97`

Text Solution

Verified by Experts

The correct Answer is:
D
`overset(o+)NH_(3) - CH_(2) - COO^(-)` (glycine) is amphoteric.
Hence, `PH = pl = (2.4 + 9.54)/(2) = 5.97`
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