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Help explain the concepts of copper sulfate, pentahydrate and copper sulfate.
copper sulfate: CuSO4 is white

copper sulfate pentahydrate: CuSO4.5H2O is blue. Be careful not to say "He" as "He". It is the crystal of copper sulfate after water absorption.

CuSO4+5H2O=CuSO4.5H2O

This reaction is a chemical reaction because it meets the definition of "new substance is generated". < p

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