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How would you separate dyes in …

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How would you separate dyes in blue black ink using Chromatography?

    • Posted by Neha Sathish 3 years, 10 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 3 years, 10 months ago

    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.

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