precautions for a range of practicals including those mentioned in the specification C3.7 Investigate the composition of inks using simple distillation… C2e Drinking C3.4 Describe an appropriate 1) Students write down Students use alum and filters to Demonstrate a simple water experimental technique to ways in which tap water clean dirty water. solar still. separate a mixture, knowing is used. the properties of the The water will become clearer Ask students to identify components of the mixture 2) Show the class a as particles form a sediment. the hazards presented beaker (or photo) of by the simple Evaluate the risks in a practical discoloured water, with distillation of water and C0.6 Equipment: Eye protection; procedure and suggest suitable suspended fine particles how to control the beaker, stirring rod, scissors, precautions for a range of and pieces of floating risks. Demonstrate plastic fizzy drinks bottle; practicals including those leaf. Students discuss adding silver nitrate coarse gravel, fine gravel, mentioned in the specification which separation solution to distilled sharp sand; alum (aluminium techniques they could water, and to water potassium use to separate water containing chloride Describe how C3.8 spatula; dirty water, a waste and ground water from the mixture, or to ions, to show the effect e.g. produced by mixing soil remove contaminating of dissolved salts. can be made potable, including with water. substances from the Discuss the reasons the need for sedimentation, water. why water used for filtration and chlorination analysis should not b sea water can be made potable by using distillation Equipment: Beaker of contain dissolved salts. c water used in analysis must discoloured water, not contain any dissolved salts produced by mixing Equipment: eye some soil and leaves with protection, 0.05 mol water. dm–3 silver nitrate solution, deionised water, sodium chloride
C3.7 precautions for a range of practicals including those mentioned in the specification Investigate the composition of inks using simple distillation… C2e Drinking water C3.4 C0.6 C3.8 Describe an appropriate experimental technique to separate a mixture, knowing the properties of the components of the mixture Evaluate the risks in a practical procedure and suggest suitable precautions for a range of practicals including those mentioned in the specification Describe how a waste and ground water can be made potable, including the need for sedimentation, filtration and chlorination b sea water can be made potable by using distillation c water used in analysis must not contain any dissolved salts 1) Students write down ways in which tap water is used. 2) Show the class a beaker (or photo) of discoloured water, with suspended fine particles and pieces of floating leaf. Students discuss which separation techniques they could use to separate water from the mixture, or to remove contaminating substances from the water. Equipment: Beaker of discoloured water, produced by mixing some soil and leaves with water. Students use alum and filters to clean dirty water. The water will become clearer as particles form a sediment. Equipment: Eye protection; beaker, stirring rod, scissors, plastic fizzy drinks bottle; coarse gravel, fine gravel, sharp sand; alum (aluminium potassium spatula; dirty water, e.g. produced by mixing soil with water. Demonstrate a simple solar still. Ask students to identify the hazards presented by the simple distillation of water and how to control the risks. Demonstrate adding silver nitrate solution to distilled water, and to water containing chloride ions, to show the effect of dissolved salts. Discuss the reasons why water used for analysis should not contain dissolved salts. Equipment: eye protection, 0.05 mol dm–3 silver nitrate solution, deionised water, sodium chloride
GCSE-Science-Term-1-Detailed-Planning-Document.docx