precautions for a range of Pictures could include paper, filter funnel, beaker, demonstrate crystals practicals including those filter feeders, chemical stirring rod, distilled water, that have formed very mentioned in the specification filtration equipment and mortar and pestle, mass slowly you could use a vacuum filters. Challenge balance, rock salt, Bunsen pre-prepared sample students to spot the link burner, tripod, evaporating that has been left out between the photos. basin, gauze, tongs. Note only to evaporate one source of rock salt is required (although if supplies from different locations are Digital: Sea salt available they may be used). If production video only one source of rock salt is available grit may be added to the source material in different amounts, creating a range of start rock salt materials. C2c Paper C3.3 Explain the experimental 1) Show a chromatogram Using a crime scenario students Demonstrate to chromatography techniques for separation of to the students and ask test different pens to see if one students how to use mixtures by them for keywords to of them could have been used chromatography to ... help describe how this to write a 'poison pen' letter analyse mixtures of e paper chromatography has been created. and compare against amino acids. a chromatogram supposedly made from ink extracted from Describe paper Equipment: Equipment: samples C3.5 the letter. chromatography as the chromatogram of individual amino separation of mixtures of (made using filter paper, acids; mixture of the soluble substances by running scissors, small beaker, individual samples; Equipment: 250 ml beaker, a solvent (mobile phase) water, coloured chromatography paper; chromatography paper cut to through the mixture on the sweet/ink/food colouring) sticky tape; pencil; fit beaker and stapled to a paper (the paper contains the melting point tubes (1 splint or attached to a pencil stationary phase), which for each sample); 2) Show the students a or glass rod using paper clips, causes the substances to move beaker with lid (large short video clip about the four different black felt pens or
precautions for a range of practicals including those mentioned in the specification Pictures could include filter feeders, chemical filtration equipment and vacuum filters. Challenge students to spot the link between the photos. paper, filter funnel, beaker, stirring rod, distilled water, mortar and pestle, mass balance, rock salt, Bunsen burner, tripod, evaporating basin, gauze, tongs. Note only one source of rock salt is required (although if supplies from different locations are available they may be used). If only one source of rock salt is available grit may be added to the source material in different amounts, creating a range of start rock salt materials. demonstrate crystals that have formed very slowly you could use a pre-prepared sample that has been left out to evaporate Digital: Sea salt production video C2c Paper chromatography C3.3 C3.5 Explain the experimental techniques for separation of mixtures by ... e paper chromatography Describe paper chromatography as the separation of mixtures of soluble substances by running a solvent (mobile phase) through the mixture on the paper (the paper contains the stationary phase), which causes the substances to move 1) Show a chromatogram to the students and ask them for keywords to help describe how this has been created. Equipment: chromatogram (made using filter paper, scissors, small beaker, water, coloured sweet/ink/food colouring) 2) Show the students a short video clip about the Using a crime scenario students test different pens to see if one of them could have been used to write a 'poison pen' letter and compare against a chromatogram supposedly made from ink extracted from the letter. Equipment: 250 ml beaker, chromatography paper cut to fit beaker and stapled to a splint or attached to a pencil or glass rod using paper clips, four different black felt pens or Demonstrate to students how to use chromatography to analyse mixtures of amino acids. Equipment: samples of individual amino acids; mixture of the individual samples; chromatography paper; sticky tape; pencil; melting point tubes (1 for each sample); beaker with lid (large
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