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A weak acid of dissociation constant 10^...

A weak acid of dissociation constant `10^(5)` is being strated with aqueous NaOH solution. The pH at the point of one-third neutralisation of the acid will be

A

`5+ log 2 - log 3`

B

`5-log 2`

C

`5 - log 2`

D

`5 - log 6`

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