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Are the oxidation state and covalency of Al in [AlCl(H2O)6]2+ same??

Hi Olivea,

 

The oxidation state of Cl is -1.Let us suppose that oxidation state of Al is x.

 

therefore, x - 1 + 6 x 0 = + 2

or,  x = + 3

 

Thus, the oxidation state of Al is +3.

 

Since, six ligands (which can donate a pair of electrons), i.e., H2O molecules are attached to the aluminium atom, therefore, its covalency is 6.

 

Hopes this will help u.. :))

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thanx siddhartha, good & ryte answer & ur answer will definitely help me... :))

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@Olivea Sarkar

Your Question is wrong its supposed to be [AlCl(H2O)5]+2 not [AlCl(H2O)6]+2

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The number of ligands in the coordinate complex( i.e. [AlCl(H2O)5]+2 ) would be six altogether

i.e.  Al and Cl would form a bond and the 5 water molecules would form a weak bond with Al which is the central atom. Therefore the total number of bonds would be six .......

Experts Please Clarify This................

           

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Hi Olivea,

The oxidation state of Cl is -1.Let us suppose that oxidation state of Al isx.

therefore,x- 1 + 6 x 0 = + 2

or,x= + 3

Thus, the oxidation state of Al is +3.

Since, six ligands (which can donate a pair of electrons), i.e., H2O molecules are attached to the aluminium atom, and total charge is +2 therfore in last shell it has 6*2 +1(after subtracting 2 from 3 valence e) and +1(cl) = 14e hence covalency = 14/2=7

Hopes this will help u.. :))

  • 1

What is the actual answer

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X-1+5×0=+2 X=+3 Where Cl=-1 (H2O)5=5×0 Al=X The coordinate covalency of Al is 6
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