What does a dot in a chemical formula mean? eg CuSO4.5H2O. Does it mean that the one molecule ofCuSO4is attached to five molecules ofH2O??? pls expalin with help of diagram...

The dot in the chemical formula shows that the molecules or species are attached with each other as independent species and they have their identity. Here five water molecules are water of crystallisation and they can be separated from the copper sulphate without changing its identity. 

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5H20 HERE IS THE WATER OF CRYSTALLISATION :)

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