Yes, copper sulphate dissolves in water. When copper sulphate is added to water, the water molecules surround and separate the copper and sulphate ions, forming a solution. This process is called hydration. The copper ions are surrounded by water molecules, forming a complex called [Cu(H2O)6]2+. The sulphate ions are also surrounded by water molecules, forming [SO4(H2O)4]2- complexes. These complexes are then dispersed throughout the water, forming a homogeneous solution.