Question

How can we obtain the coloured component (dye) from ink?

Answer 1

We can separate the dye from the ink by the process of evaporation.

Ink is a mixture of a dye in water and hence the volatile solvent (water) can be separated from its non-volatile solute( dye) in the container by the method of evaporation.

Coloured component (dye) from ink can be separated by following the procedure given below:

• Take a watch glass with some ink in it
• Now take a beaker with water
• Place a watch glass on the mouth of the beaker
• Now start heating the beaker.
• When the beaker gets heated, the ink in the watch glass on the beaker also get heated.
• Evaporation starts taking place from the watch glass.
• Continue heating as the evaporation goes on and stop heating when you do not see any further change on the watch glass.
• We see that water in ink gets evaporated
• However, dye remain as residue on watch glass.