Question

Take some Crystal of blue vitriol in two test tubes . Add some water in one test tube and shake it. what did you see?​

Answer 1

Answer:

When pieces of blue vitriol are heated in a test tube, then crystal structure of blue vitriol broke down to forn a colourless powder and water come out. This water is called water of crystallization. when water is added to the same test tube, then white powder turned into blue colour again.This is due to reversible reaction take place from anhydrous salt to hydrous salt and vice-versa. 

CuSO4.5H2O⇌CuSO4+5H2O