English National Curriculum - Science
Mission Objectives
Describe a method for paper chromatography
Interpret chromatograms and determine Rf values from chromatograms
Explain what happens to substances during the process of chromatography
Save files related to this lesson
Words and meanings to learn
solvent
the liquid that carries the substances through the paper
mobile phase
the solvent that flows through the stationary phase and carries the substances with it
stationary phase
the part that does not move in chromatography; in paper chromatography, this is the paper
retention factor
a number used to help identify substances; it is calculated using: Rf = distance moved by substance ÷ distance moved by solvent
chromatography
a method for separating mixtures
Sarah is a former headteacher and charity CEO who founded Developing Experts in October 2015 with the goal to create a fit-for-purpose curriculum for schools. The company has created a science curriculum for children ages 4-16 which is delivered through sequenced lessons mapped against the National Curriculum in biology, chemistry, and physics. Developing Expert's innovative approach to learning has already been road-tested and voted 'best EdTech product in Europe', winning Tech Nation’s Rising Stars earlier in 2019 and a place on Google for Startups Immersion program 2020. In 2022 Developing Experts won the BETT Awards for Best Classroom Resource - Teaching Aid. Sarah is a 'LDC Top 50 Most Ambitious Business Leader' 2022. In October 2022 Developing Experts joined Tech Nation's Upscale 8.0 programme.
Sarah is delighted to be working with over 6500 UK schools and clients such as the Royal Horticulture Society, Network Rail, Rolls Royce, BEIS, National Nuclear Labs, Anglian Water and the Ministry of Defence.
Sarah was awarded an MBE for her services to tech and education in 2020.
Samantha is a dedicated and accomplished science educator with over 15 years of leadership experience in the field, coupled with a strong background in scientific analysis. She has a proven track record of strategically managing educational departments, driving operational efficiencies, and nurturing collaborative relationships with stakeholders.
Samantha previously served as the Head of Chemistry and Sixth Form Tutor, Ilkley Grammar School, Ilkley with extensive Key Stage 4 and 5 teaching experience and leadership. In addition to her teaching and leadership roles, she is also an examiner for AQA, providing her with valuable insight into assessment standards and exam specifications.
In her spare time, Samantha enjoys playing the accordion with her local orchestra and has recently taken up cricket, where she's enthusiastically honing her skills both on and off the pitch!
Required practical 6: Investigate how paper chromatography can be used to separate and tell the difference between coloured substances. Students should calculate Rf values.
Expert film
Mission assignment film
Unlock expert-designed lessons, resources, and assessments tailored for educators. No credit card required.
Claim Your Free Trial →