1.

A hexa-coordinated complex of formula CoCl_(3).6H_(2)O undergoes 100% ioisation is aqueous solutin to give van't Hoff factor equal to 3. Which of the following is/are correct regarding the given complex?

Answer»

Effective atomic number of the complex is 36.
The complex loses some WEIGHT when treated with anhydrous `CaCl_(2)`
Aqueous solution of complex has negligible MOLAR conductivity.
1 mole of the complex gives 2 mole AgCl precipitate when treated with excess of `AgNO_(3)` solution.

Solution :van't Hoff factor of 3 indicates one complex cation ad 2 chloride ions in IONIC sphere per molecule which gives `[Co_(H_(2)O)_(5)CL]Cl_(2).H_(2)O`
`EAN=27-3+12=36`
Anhydrous `CaCl_(2)` is dehydrating agent which absorbs the water of crystallization outside coordination sphere.


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