The property difference that enables this separation is: Difference in solubility
Solubility can be defined as the ability for a substance that is the solute to mix and form new substance with another substance which is the solvent
Solubility differences can be used to separate the two substances that is Sand and copper (II) sulfate. Because one is soluble in water whereas the other is not soluble in water.
In conclusion, The property difference that enables this separation is: Difference in solubility
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