C2 C2.1g describe the techniques of paper and thin The OCR Particles, Atoms and Elements provides This part moves directly on from the previous work on – layer chromatography ideas and resources for this part of the course. separation and purification. Chromatography is likely Topic 1 Part 3 to be the first separation techniques learners will have C2.1h recall that chromatography involves a A useful website on paper chromatography and Rf – 2 hours met, possibly even at KS1/2 by separating out pen ink. stationary and a mobile phase and that separation values is . (separate and If they are well versed in the basics, then this part depends on the distribution between the phases Chromatography can be carried out, covering PAG combined) provides opportunities to extend their knowledge – [identification of the mobile and stationary phases] C3, for example with: interesting contexts include forensic science, C2.1i interpret chromatograms, including measuring – pharmaceutical development and environmental Rf values [the recall and the use of the formula] monitoring. C2.1k suggest chromatographic methods for – distinguishing pure from impure substances [paper, Alternatively, learners could plan and carry out a thin layer (TLC) and gas chromatography] into extracting and purifying the coloured CM2.1iii change the subject of a mathematical – compounds from, for example, red cabbage equation (anthocyanins) or grass (chlorophyll). CM2.1iv arithmetic computation and ratio when – Videos on the and their use in are available. determining empirical formulae, balancing equations CLEAPSS provide also provide a to carrying out simple, inexpensive and successful chromatography. Outline Scheme of Work: C2 Elements, compounds and mixtures – Total suggested teaching time 28 / 24 hours (separate / combined) –
C2 Topic 1 Part 3 2 hours (separate and combined) C2.1g – describe the techniques of paper and thin layer chromatography C2.1h – recall that chromatography involves a stationary and a mobile phase and that separation depends on the distribution between the phases [identification of the mobile and stationary phases] C2.1i – interpret chromatograms, including measuring Rf values [the recall and the use of the formula] C2.1k – suggest chromatographic methods for distinguishing pure from impure substances [paper, thin layer (TLC) and gas chromatography] CM2.1iii – change the subject of a mathematical equation CM2.1iv – arithmetic computation and ratio when determining empirical formulae, balancing equations The OCR Particles, Atoms and Elements provides ideas and resources for this part of the course. A useful website on paper chromatography and Rf values is . Chromatography can be carried out, covering PAG C3, for example with: Alternatively, learners could plan and carry out a into extracting and purifying the coloured compounds from, for example, red cabbage (anthocyanins) or grass (chlorophyll). Videos on the and their use in are available. CLEAPSS provide also provide a to carrying out simple, inexpensive and successful chromatography. This part moves directly on from the previous work on separation and purification. Chromatography is likely to be the first separation techniques learners will have met, possibly even at KS1/2 by separating out pen ink. If they are well versed in the basics, then this part provides opportunities to extend their knowledge – interesting contexts include forensic science, pharmaceutical development and environmental monitoring. Outline Scheme of Work: C2 – Elements, compounds and mixtures Total suggested teaching time – 28 / 24 hours (separate / combined)
304354-topic-c1-and-topic-c2-suggested-teaching-hours-and-outline-scheme-of-work.docx