How many hydrogen-bonded water molecule(s) are associated in `CuSO_(4).5H_(2)O`?

Options

A. 1
B. 2
C. 3
D. 4

Answer

A

Explanation

Hydrated copper sulphate or `CuSO_4. 5H_2O` is blue in colour and this colour is attributed to the presence of hydrated Cu(II) ion, i.e. `[Cu(H_2O)_4]^(2+)`. The numbers of water molecules directly attached to `Cu^(2+)` or present within the co-ordination sphere are 4 and one `H_2O` is present outside the coordination sphere.
`:. CuSO_4 . 5H_2O` can be written as
`[Cu(H_2O)_4]SO_4 H_2O`.