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The formation constant of Ni(NH3)6^(2+) ...

The formation constant of `Ni(NH_3)_6^(2+)` is `6xx10^8` at `25^@C`.If 50 ml of 2.0 M `NH_3` is added to 50 ml of 0.20 M solution of `Ni^(2+)` , the concentration of `Ni^(2+)` ion will be nearly equal to :

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