Column chromatography vs paper chromatography? What is the stationary phase in column chromatography? What is elution? What is thin layer chromatography? All this and more covered in this comprehensive lesson with questions and answers! This is a Year 13 A level lesson for Edexcel International Unit 4 – WCH14, but it can also be used for all UK exam boards. All the slides in this lesson are fully animated and include answers to every mini plenary question and exam question. The breakdown of the slides (which are best opened on Microsoft PowerPoint) is as follows:

Slide 1 - Title and 5-minute starter. The starter is a grid of four questions entitled ‘last week, last lesson, today’s learning and future learning’. Use this generic slide for all your lessons by simply changing the questions and the answers each time.
Slide 2 - Lesson objectives (see thumbnail image)
Slide 3 – Introduction to chromatography, including what it is used for
Slide 4 – use this slide to present students to the two different phases in chromatography
Slides 5 – 6: use this section to explain the differences between paper chromatography, thin layer chromatography and column chromatography. This can be especially helpful to teach students what the mobile phase and stationary phases are in each one
Slide 7 – learning pit stop questions to check for students’ understanding so far
Slide 8 – explains how a chromatogram is produced
Slide 9 – explains how a chromatogram should be interpreted
Slide 10 – what an Rf value and how it is calculated
Slide 11 - learning pit stop questions to check for students’ understanding so far
Slide 12 – explains how a chromatogram can be used to check for purity
Slide 13 – use this slide to explain to students what column chromatography is, the mobile and stationary phases used and the method
Slide 14 – definition of elution
Slides 15 – 17: diagram showing the steps of column chromatography in a burette
Slide 18 – the advantage of column chromatography against paper chromatography
Slides 19 – 24: exam questions with mark scheme answers included with this resource

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