Question

Cucl is insoluble in water while NaCl is soluble in water. Explain

Answer 1

Because hydrogen is more reactive than copper so it can displace its place but in the case of NaCl, Na is more reactive then hydrogen and it can make in aq. Solution

Answer 2

The solubility of different chemical compounds depends on various chemical factors and circumstances.

Similarly,the molecular size of the solute substances has to be smaller than the molecular size of the solvent,to achieve a proper solubility.

And the molecular size of the Cu metal is way more larger than the water molecules but the molecular size of the Na is smaller than the water.

That's why CuCl2 is insoluble in the water but the NaCl2 is soluble.