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100ml 0.1M H(3)PO(4) is mixed with S0ml ...

100ml `0.1M H_(3)PO_(4)` is mixed with S0ml of 0.1M NaOH. What is the pH of the resultant solution? (Successive dissociation constant of `H_(3) PO_(4) "are" 10^(-3) , 10^(-8) and 10^(-12)` respectively ?

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