A complex is represented as CoCl(3) . XN...

A complex is represented as `CoCl_(3) . XNH_(3)`. Its `0.1` molal solution in aqueous solution shows `Delta T_(f) = 0.558^(circ). (K_(f)` for `H_(2)O` is `1.86 K "molality"^(-1))` Assuming `100%` ionisation of complex and co-ordination number of `Co` as six, calculate formula of complex.

`[Co(H_(2)O)_(4)Cl]Cl_(2)`

`[Co(H_(2)O)_(4)Cl_(2)]Cl`

`[Co(H_(2)O)_(6)]Cl_(3)`

`[Co(H_(2)O)_(5)Cl]Cl_(2)`

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A complex is represented as CoCl_(3)Xnh_(3) . Its 0.1 molal solution in water DeltaT_(f)=0.588 K. K_(f) for H_(2)O is 1.86K" molality"^(-1) . Assuming 100% ionisation of complex and co - ordination number of Co is six calculate formula of complex.

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