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At 25^(@)C,pKa for weak acid, HA=x and p...

At `25^(@)C,pK_a` for weak acid, HA=x and `pK_b` for `A^-` the conjugate base of HA=y. find the value of (x+y) at this temperature.

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The correct Answer is:
`(x+y)=14`
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