1.

The rapid change of pH near the stoichiometricpoint of an acid-base titration is the basis of indicator detection. pH of the solution is related to ratio of the concentration of the conjugate acid (Hin) and base [H^(+)] = 10^(-7) + 10^(-8) = 10^(-7)[1+0.1] forms of the indicator by the expression

Answer»

`LOG.([HIn])/([In^(-)]) = PH - pK_(In)`
`log.([In^(-)])/([HIn]) = pH - pK_(In)`
`log.([In^(-)])/([HIn]) = pK_(In) - pH`
`log.([HIn])/([In^(-)]) = pK_(In) - pH`

Answer :B


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