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Titration of diprotic acid (H(2)A) by s...

Titration of diprotic acid `(H_(2)A)` by strong base has been summarised in following graph

What is composition of mixture when pH of solution is `10.137?`

A

`25% HA,75% A^(2-)`

B

`75%HA, 25%A^(2-)`

C

`25% H_(2)A^(+),75%H_(2)A`

D

`75% H_(2)A^(+),25%H_(2)A`

Text Solution

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The correct Answer is:
A
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