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In CuSO4·5H2O, how many water molecules are not directly bonded to the copper ion?

1. 2
2. 3
3. 1
4. 4

Correct answer: 1

Solution

In CuSO4·5H2O, one water molecule is directly coordinated to the copper ion, while the remaining four water molecules are not bonded directly to the copper but are part of the crystal structure, making the correct answer 1.

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