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Question

What is the coordination number of Cu2+ in CuSO45H2O?

A
5
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B
4
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C
3
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D
2
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Solution

The correct option is D 4
The total number of points of attachment (or ligand) attached to the central metal ion through coordinate bonds is called coordination number of the metal ion. In CuSO4.5H2O, four of the water molecules are connected through coordinate bond and the fifth molecule of water is of crystallization. Its complex formula can be written as:
[Cu(H2O)4]SO4.H2O

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