General Science • ChemistryMedium
What color does an anhydrous copper(II) sulfate powder turn upon absorbing moisture of crystallization?
A. Pink
B. Blue✓ Correct Answer
C. Green
D. Yellow
💡 Solution & Explanation
Anhydrous copper(II) sulfate is white and turns blue upon hydration because it forms copper(II) sulfate pentahydrate in the presence of water molecules. Incorrect choices like pink or green do not represent this specific hydration reaction. Water of crystallization is the fixed number of water molecules chemically attached to a salt in its crystalline form.
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