The number of hydrogen bonded water molecule(s) associated with stoichiometry CuSO .5H O is _______. — Hydrogen Chemistry Question

💡 Solution & Explanation

**Step 1: Understand the formula notation** The formula CuSO₄·5H₂O indicates that 5 water molecules are associated with copper sulfate. Of these, some are coordinated (bonded) to the metal center, and others are hydrogen bonded in the crystal lattice. **Step 2: Identify the coordination structure** In CuSO₄·5H₂O, copper(II) is octahedral with 4 water molecules directly coordinated to Cu²⁺ through coordinate covalent bonds. **Step 3: Account for total water molecules** Total water molecules = 5 Water molecules coordinated to Cu²⁺ = 4 Remaining water molecules = 5 - 4 = 1 **Step 4: Determine the bonding type of remaining water** The remaining 1 water molecule is not directly bonded to the metal center. Instead, it exists in the crystal structure and forms hydrogen bonds with other molecules (such as the sulfate ion or coordinated water molecules). **Step 5: Identify hydrogen-bonded water** Only water molecules held in place through hydrogen bonding (not coordinate covalent bonds) are counted as "hydrogen bonded." Therefore, the answer is **1.00**.