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What is the pH of 0.01 M glycine solutio...

What is the `pH` of `0.01 M` glycine solution?
[For glycine, `K_(a_(1))=4.5xx10^(-3)` and `K_(a_(2))=1.7xx10^(-10)` at `298 K`]

A

`3.0`

B

`10.0`

C

6.1

D

7.2

Text Solution

Verified by Experts

The correct Answer is:
C
`K=Ka_(1)xxKa_(2)=4.5xx10^(-3)xx1.7xx10^(10)`
`=7.65xx10^(-13)`
`[H^(+)]=sqrt(KC)=sqrt(7.65xx10^(-13)xx0.01`
`=sqrt(7.65x10^(-15)=0.87xx10^(-7)`
`pH=log 0.87xx10^(-7)=7-0.93=6.07`.
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