What will be the residue left on the watch glass on heating blue ink in it?
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Explanation:
The residue left on the watch glass is the solute, dye. Due to heating of the ink the water, solvent in the ink got evaporated leaving behind the dye, the solute.
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Answer:
Continue heating as the evaporation goes on and stop heating when you do not see any further change on the watch glass. Now we will observe that the water get evaporated from the watch glass and residue is left in the watch glass. This residue is the coloured component (Dye).
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