Question

The solution of 2 salts were tested with the phenolphthalein . The observations were recorded in the table . What was the reason for these observations?

Answer 1

It has been demonstrated that most hydrated salts are colorless and become colored by loss of water. Loss of water can be effected by heat, pressure, friction or certain solvents and such loss of water is probably a dehydration from the carbinol form to the quinoid form.