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

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SUMMARY

The discussion centers on the coordination of water molecules in the compound CuSO4·5H2O. Participants assert that copper exists as Cu2+, which has one vacant d-orbital, leading to the expectation of one water molecule attached by coordinate bond. However, the consensus reveals that two water molecules are indeed attached via coordinate bonds, forming the complex [Cu(H2O)4]²⁺SO4²⁻·H2O, indicating a total of four water molecules in the structure.

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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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