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10 mLof H,A (weak diprotic acid) solutio...

10 mLof H,A (weak diprotic acid) solutions is titrated against 0.1M NaOH. pH of the solution is plotted against volume of strong base added and following observation is made. If pH of the solution at `1^(st)` equivalence point is `pH_(1)` and at `2^(nd)` equivalnee point is `pH_(2)`, Cal the value `(pH_(2),-pH_(1))` at `25^(@)`C. Given for `H_(2),A, p^(Kal) =4.6 &p^(Ka2) =8`

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