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Following titration method is taken to c...

Following titration method is taken to compute stepwise ionisation constant of a weak dibasic acid

has two ionisable protons and there can be stepwise neutralisation by NaOH.
Which `H^(+)` removed in step `I`?
`pK_(a_1) (=-logK_(a_1))` of p-hydroxybenzonic acid is :

A

`4.57`

B

`9.47`

C

`4.9`

D

`7`

Text Solution

Verified by Experts

The correct Answer is:
a
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