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25 ml of 0.2 M of a weak monoacidic base is titrated with 0.1 M solution of HCI at `25^oC`. What will be `H^+` concentration at equivalence point `(k_(b(NH_4OH)) = 1xx10^(-12), K_(w(H_2O)` at `25^oC = 1.0 xx 10^(-14))`
A. |
`2.13 xx 10^(-2)` m/L |
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B. |
`1.2 xx 10^(-2)` m/L |
C. |
`6.2 xx 10^(-2)` m/L |
D. |
none |