\( CuSO_4.5H_2O \) से जुड़े हाइड्रोजन आबंधित जल अणु/अणुओं की संख्या है

In \( CuSO_4.5H_2O \), four water molecules are coordinated to copper \( Cu^{2+} \), and the fifth water molecule is held by hydrogen bonding between the sulfate ion and coordinated water molecules.