1.

The rapid change of pH near the stoichiometric point of an acid-base titration is the basis of indicator detection. The pH of the solution is related to ratio of the concentration of the conjugate acid (Hin) and base (In^(-)) forms of the indicator by the expression

Answer»

`"log"([In^(-)])/([HIN])=pK_(In)-PH`
`"log"([HIn])/([In])=pK_(In)-pH`
`"log"([HIn])/([In^(-)])=pH-pK_(In)`
`"log"([In^(-)])/([HIn])=pH-pK_(In)`

ANSWER :B


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