If the freezing point of a `0.01` molal aqueous solution of a cobalt (III) chloride-ammonia complex (which behaves as a strong electrolyte) is `-0.0558^(@)C`, the number of chloride (s) in the coordination sphere of the complex if `[K_(f)` of water `=1.86 K kg mol^(-1)]`

Answer

1

Explanation

`Delta T_(f)=K_(f)xx ixx m rArr 0.0558=1.86xx ixx0.01`
i=3
Given complex behaves as a strong electrolyte `alpha = 100%`
n = 3(no. of particles given by complex)
`therefore` complex is `[Co(NH_(3))_(5)Cl]Cl_(2)`
no. of `Cl^(-)` ions in the co-ordination sphere of the complex = 1
`Delta T_(f)=K_(f)xx ixx m`
`0.0558=1.86xx ixx0.01`
i = 3