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For 1 molal aqueous solution of the foll...

For 1 molal aqueous solution of the following compounds, which one will show the highest freezing point ?

A

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

B

`[Co(H_(2)O)_(4)CI_(2)]CI.H_(2)O`

C

`[Co(H_(2)O)_(4)CI_(2)]CI.2H_(2)O`

D

`[Co(H_(2)O)_(3)CI_(3)].3H_(2)O`

Text Solution

Verified by Experts

The correct Answer is:
d
The solution showing maximum freezing point must have least `Delta T_(f)` value and therefore miximum number of solute particles or ions.
`[CO(H_(2)O)_(6)]to[CO(H_(2)O)_(6)]^(3+)+3CI^(-)`
`[CO(H_(2)O)_(5)CI]CI_(2).H_(2)Oto[CO(H_(2)O)_(5)CI]^(2)+2CI^(-)`
`[CO(H_(2)O)_(4)CI_(2)]CI._(2)H_(2)Oto[CO(H_(2)O)_(2)CI_(2)]^(+)+CI^(-)`
`[CO(H_(2)O)_(3)CI_(3)].3H_(2)Oto[CO(_(2)O)_(3)CI_(3)]`
The correct option is (d)
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