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The coordination number of Al in the cry...

The coordination number of `Al` in the crystalline state of `AlCl_(3)` is _____.

Text Solution

Verified by Experts

The correct Answer is:
`(6)`
`AlCl_(3)` in acidified aqueous solution crystallises as octahedral `[Al(H_(2)O)_(6)]^(+3) Cl_(3)^(-3)`. In this complex, the `3d` orbitals of `Al` are involved and hybridisation state of `Al` is `sp^(2) d^(2)`. Hence, the coordination number of `Al` is six. It exits in `ccp` lattice with six coordinate layer structure.
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Knowledge Check

  • The coordination number of F^(-) ion in CaF_(2) crystalline structure is

    A
    8
    B
    2
    C
    4
    D
    6

  • The coordination number of Al is potassium trioxalato aluminate (III) is

    A
    3
    B
    4
    C
    5
    D
    6

  • In aluminates, the coordination number of Al is

    A
    `4`
    B
    `6`
    C
    `3`
    D
    `1`