Question

why does k2cro4 turn orange on addition of acid?​

Answer 1

Answer:

Yellow chromate ion and orange dichromate ion are in equilibrium with each other in aqueous solution. The more acidic the solution, the more the equilibrium is shifted to favour the dichromate ion. As hydrochloric acid is added to the potassium chromate solution, the yellow colour turns to orange.

Answer 2

Yellow chromate ion and orange dichromate ion are in equilibrium with each other in aqueous solution. The more acidic the solution, the more the equilibrium is shifted to favour the dichromate ion. As hydrochloric acid is added to the potassium chromate solution, the yellow colour turns to orange