A student prepares aqueous solutions of the following salts: Copper sulphate, ferrous sulphate, sodium sulphate and barium chloride. Write the color of each solution thus formed?
Answer. Copper sulphate (aq) – blue in color
Ferrous sulphate (aq) – pale green in color
Sodium sulphate (aq) – colorless
Barium chloride (aq) – white in color