1.13 practical: investigate paper chromatography using inks/food colourings


PAPER CHROMATOGRAPHY

Diagram Showing the Paper Chromatography of Ink and Plant Dye

USE: To Separate Substances that have Different Solubilities in a Given Solvent (E.g Different Coloured Inks that have been Mixed to Make Black Ink)

METHOD:

  • Pencil Line is Drawn on Chromatography Paper and Spots of Ink / Dye is Placed on it
  • Paper is Lowered into a Bucket of Solvent, Allowing the Solvent to Travel Up the Paper, Taking some of the Coloured Substances with it
  • Allow Chromatography to Occur until the Solvent Reaches the Top of the Paper

RESUTS:

  • As the Solvent Travels Up the Paper, Different Substances will have Different Solubilities so will Travel at Different Rates, Causing the Substances to Spread Apart
  • This will show the Different Components of the Ink / Dye

- http://igcse-chemistry-2017.blogspot.ae/2017/07/113-practical-investigate-paper.html

Comments

  1. Aashi7 March 2021 at 20:20

    nice.

    ReplyDelete
  2. Emma Jasmine10 March 2021 at 00:30

    You shared a very interesting practical illustration for chromatography using inks/food colouring's in chemistry. I think that there is a lack of practical sessions in the science stream and the emphasis is more on theoretical learning. Students become more and more inclined towards subjects like chemistry and physics when they do such practical activities. Tutors must engage students in more practical activities for 'o' Level Chemistry tuition also as the curriculum has lots of topics for practical activities. It will develop their interest in the subject and will give a clear understanding of the topic.

    ReplyDelete
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