Question

Describe an activity to show that ink is a mixture of a dye in water. draw a labelled diagram and state the underlying principle.

Answer 1

The ink of any colour is a heterogeneous mixture of dye and water, which is difficult to prove under normal circumstances.

So it is best to take a beaker and fill it up with water. Then a watch glass containing some colored ink needs to be placed over the beaker.

The beaker should be placed over a burner to heat it gradually, till all the water from the colloidal solution of ink is evaporated. Then only a little solid residual dye of the ink will be left on the watch-glass. 

Answer 2

Answer:

The ink of any colour is a heterogeneous mixture of dye and water , which is difficult to prove under normal circumstances.

So it is best to take a beaker and fill it with water.Then a watch glass containing some coloured ink needs to be placed over the beaker.