Chemistry Water Molecules in CuSO4.5H2O: How Many are Attached by Coordinate Bond?

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In CuSO4.5H2O, the question revolves around how many water molecules are attached by coordinate bonds. The discussion highlights that copper exists as Cu2+, which has a vacant d-orbital, leading to an initial assumption of one water molecule forming a coordinate bond. However, it is clarified that there are actually two water molecules involved in coordinate bonding. Additionally, the complex structure is noted as [Cu(H2O)4]²⁺SO4²⁻·H2O, suggesting that four water molecules are coordinated in total. The conclusion emphasizes the complexity of copper's bonding in this hydrated salt.
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Homework Statement


How many water molecule in CuSO4.5H2O attached only by coordinate bond?

The Attempt at a Solution



Copper exists in the form of Cu2+. So, it has one vacant d-orbital. The answer should then be 1. But it's 2 :(
 
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utkarshakash said:

Homework Statement


How many water molecule in CuSO4.5H2O attached only by coordinate bond?

The Attempt at a Solution



Copper exists in the form of Cu2+. So, it has one vacant d-orbital. The answer should then be 1. But it's 2 :(

Copper can form complexes but I don't see how the answer is 2. To my knowledge, it exists as ##[Cu(H_2O)_4]^{+2}SO_4^{2-}\cdot H_2O##. Hence, the answer should be 4.
 
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