Week 5: Chromatography

We are learning what chromatography is.

So that we can use it to seperate colours.

You will be able to explain with chromatography is and how it is used to seperate.

Task 1: Watch the video on Chromatography.

- Paper chromatography is a method to separate substances in a mixture.

- A pencil line called the baseline is drawn on filter paper, and ink is added to it.

- The solvent moves up the paper, separating the dyes in the ink and creating a chromatogram.

chromatography (noun)

a method used to separate and analyze the components of a mixture based on their different rates of movement in a mobile phase.

Example Sentence: We used paper chromatography to separate the different dyes in the ink.

submerge (verb)

to completely cover or immerse something in a liquid.

Example Sentence: We made sure not to submerge the pencil line and ink spot in the solvent.

solvent (noun)

a substance that is capable of dissolving other substances.

Example Sentence: The water or ethanol we used in the beaker was the solvent for our experiment.

dissolve (verb)

to mix completely with a liquid and become part of it.

Example Sentence: The dyes in the ink dissolved in the solvent as it seeped up the paper.

chromatogram (noun)

the pattern of spots left on the paper after chromatography, which can be used to identify the components of a mixture.

Example Sentence: We analyzed the chromatogram to determine the different substances present in the ink.

Task 2: Complete the Experiment of Chromatography

Lesson 2: Write up the Chromatography experiemt as an experimental report.

Students can use the second lesson of this week to write up the experiment as a practical report.