This lesson is designed for the NEW AQA Trilogy Chemistry GCSE, particularly the ‘Chemical Analysis’ SoW.
 
The lesson starts with an introduction to chromatography, pupils are told the importance of the process along with an example of a chromatogram.
 
Pupils will then watch a video on the steps involved with a chromatography experiment and they will need to arrange a set of statements in the correct order to put together a suitable method. This task can be self-assessed using the mark scheme provided on the PowerPoint. Pupils will now use these steps to conduct their own chromatography experiment, once they have completed this task they can stick their chromatogram in their books and complete a conclusion and evaluation.
 
Next, pupils will watch another video which goes into more detail of the chromatography method, pupils will be provided with a set of questions which they will need to answer using the information provided in the video. The answers to these questions can then be self-assessed using the mark scheme provided.
The next part of the lesson focuses on how to identify unknown substances using chromatography, pupils will firstly be shown a worked example of how to calculate Rf values. They will then be given a worksheet of chromatograms, for each one they will need to calculate the Rf value of each of the substances and will need to answer a set of questions also. This work can be self-assessed using the mark scheme provided.
 
The plenary task requires pupils to write three facts, three key words and question on what they have learned during this lesson.
All resources are included at the end of the presentation.