English National Curriculum - Science
Mission Objectives
Describe the process of chromatography
Calculate the Rf value
Evaluate the process of chromatography and suggest improvements
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Words and meanings to learn
stationary phase
phase in chromatography that does not move, for instance, the paper in chromatography
Rf value
the ratio between the distance travelled by the dissolved substance (the solute) and the distance travelled by the solvent
mobile phase
phase in chromatography that moves, usually a solvent or mixture of solvents
insoluble
a substance that does not dissolve in a solvent
soluble
a substance that can be dissolved in a solvent to form a solution
Samantha is an accomplished science educator with over 15 years of leadership experience and a strong background in scientific analysis. She has a proven record of leading departments effectively, improving practice, and working collaboratively with stakeholders.
In her current work, Samantha embeds evidence-informed pedagogical principles such as retrieval practice, clear modelling, and effective sequencing to support high-quality curriculum design and professional development. She draws on assessment insight and common misconceptions to help teachers secure strong student understanding.
She is a former Head of Chemistry and Sixth Form Tutor at Ilkley Grammar School, with extensive Key Stage 4 and 5 experience, and an AQA examiner, giving her valuable insight into assessment standards and exam requirements.
In her spare time, Samantha enjoys playing the accordion with her local orchestra and has recently taken up cricket.
Class practical on paper chromatography using coloured pens: coloured felt tips, chromatography paper, pencils, rulers, wooden splints, paperclips.
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