1.

One molal solution of a complex of cobalt chloride with NH_(3) in water showed an elevation in boiling point equal to 2.08^(@). Assuming that the complex is completely ionized in the solution, the complex is (K_(b) for water = "0.52 K kg mol"^(-1))

Answer»

`[CO(NH_(3))_(6)]Cl_(3)`
`[Co(NH_(3))_(5)Cl]Cl_(2)`
`[Co(NH_(3))_(4)Cl_(2)]Cl`
none of these

Solution :`DeltaT_(b)=iK_(b)m`
`2.08xxixx0.52xx1 or i=4`
This means that the complex produces 4 ions in the solution.
Hence, the complex is `[Co(NH_(3))_(6)]Cl_(3)`.


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