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CBSE Class 9 Answered

How will you separate dyes in black ink using chromatography? Explain it with the help of a diagram.
Asked by Topperlearning User | 05 May, 2015, 09:49: AM
answered-by-expert Expert Answer

Method:

1.Take a thin strip of filter paper.

2.Draw a line on it using a pencil approx. 3 cm above the lower edge.

3.Put a small drop of ink with help of a pen at centre of line and let it dry.

4.Lower the filter paper into a glass jar containing water in such a way that the ink's drop remains just above the water level. Leave it undisturbed.

5.Water rises up in the filter paper. Ink drop splits up into its constituents.

Conclusion:Dye in black ink is a mixture of 2 or 3 colours. The coloured component that is more soluble in water rises faster and in this way the colours get separated.

Answered by | 05 May, 2015, 11:49: AM

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