Answer :
(A) [tex]CuCl_2[/tex] : It is soluble in water.
(B) [tex]BaSO_4[/tex] : It is insoluble in water.
Explanation :
Solubility : It is defined as the amount of solute dissolved in a solvent at a given temperature.
According to the solubility rules:
All chlorides are soluble except [tex]Ag^+,Pb^+\text{ and }Hg^{2+}[/tex]
All sulfates are soluble except [tex]Ba^{2+},Pb^{2+},Ca^{2+}\text{ and }Sr^{2+}[/tex]
From this we conclude that,
(A) [tex]CuCl_2[/tex] : It is soluble in water.
(B) [tex]BaSO_4[/tex] : It is insoluble in water.
