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
  3. ziyyaraedutech20 April 2021 at 01:02

    Ziyyara is a one stop solution for online tuition in Gurugram. Ziyyara's Gurugram home tutors are offering holistic online learning to the students for achieving good marks.">
    Call Our Experts :- +91-9654271931

    ReplyDelete

Post a Comment

Popular posts from this blog

1.11 understand how a chromatogram provides information about the composition of a mixture

Image
PAPER CHROMATOGRAPHY - COMPOSITION OF A MIXTURE Diagram Showing the Composition of an Ink using Paper Chromatography COMPOSITION OF A MIXTURE: Chromatograms will Show the Composition of a Mixture as the Different Coloured Substances (Components) will Spread Apart as they will Have Different Solubilities so will Travel at Different Rates A Pure Substance will Only Produce One Spot on the Chromatogram during Paper Chromatography In the Diagram Above, Red, Blue and Yellow are Three Pure Substances, whilst the Sample on the Left is a Mixture of All Three - https://igcse-chemistry-2017.blogspot.ae/search?q=1.11
Read more

1.3 understand how the results of experiments involving the dilution of coloured solutions and diffusion of gases can be explained

Image
Osmosis : Water particles have   a kinetic energy which allows them to bounce off of each other and mix with the particles of the coloured solution. Eventually the coloured solution will be evenly dispersed  throughout the water, diluting it and making the water turn the colour of the dye. Osmosis is the movement of water from a less concentrated solution to a more concentrated solution through a partially permeable membrane. Diffusion: Gas particles have a high kinetic  energy which allows them to bounce off each other and disperse throughout the air, mixing with other particles. eg. the spreading of the scent of perfume through the air Diffusion is the spreading of particles from an area of high concentration to an area of low concentration.
Read more