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Thursday, August 5, 2021

How many hydrogen bonded water molecules does CuSO4.5H2O have?

In Cupper Sulphate pentahydrate (CuSO4.5H2O) Cu is coordinated with 4 water molecules and two more oxygen atoms from Sulphate ion. And hence the coordination number of Cu (II) ion is six and hybridization is sp3d2 with distorted octahedral geometry. Now fifth water molecule is hydrogen bonded and is deeply embedded in crystal.

Thus it is clear that four (4) water molecules are coordinated and one (fifth one) water molecule is bonded with hydrogen bond. And its formula also written as [Cu(H2O )4SO4].H2O

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