10 1 5/6 2.5 Chromatography (RT) Explain how to set up chromatography Distinguish pure from impure substances. Interpret chromatograms and calculate Rf values. (RT) C2.1f–k Practical sheet; Worksheet; Technician’s notes Quick starter Homework worksheet Homework quiz Video 10 1 5/6 2.6 Practical: Investigate how paper chromatography can be used in forensic science to identify an ink mixture used in a forgery Describe the safe and correct manipulation of chromatography apparatus and how accurate measurements are achieved. Make and record measurements used in paper chromatography. Calculate Rf values. PAG Practical sheets 1 and 2; Technician’s notes Quick starter Homework worksheet Homework qu Quick starter Homework worksheet Homework quiz iz 10 1 5/6 2.7 Maths skills: Use an appropriate number of significant figures Measure distances on chromatograms. Calculate Rf values. Record Rf values to an appropriate number of significant figures. CM2.1 Presentation Quick starter Homework worksheet Homework quiz 10 1 7/8 2.8 Comparing metals and non-metals Review the physical properties of metals and Compare the oxides of metals and of non-metals. Make predictions unknown metals and non-metals. C2.2a Worksheet; Practical sheet; Technician’s notes; Presentations 1 and 2 Quick starter Homework worksheet Homework quiz 10 1 7/8 2.9 Electron structure Find out how electrons are arranged in atoms. Use diagrams and symbols to show which energy levels they occupy. Relate each element’s electron configuration to its position in the periodic table. C2.2c Worksheets 1, 2 and 3; Technician’s notes; Presentation Quick starter Homework worksheet Homework quiz 10 1 7/8 2.10 Metals and Explore the links between electron configurations of elements and their properties. Find out what happens to the outer electrons when metals react. Draw diagrams to show how ions form. C2.2b Worksheets 1 and 2; Technician’s notes Quick starter Homework worksheet Homework quiz metals.
10 1 7/8 2.11 Chemical bonds (HT) Describe the three main types of bonding. Explain how electrons are used in the three main types of bonding. Explain how bonding and properties are linked. (HT) C2.2d–h Worksheets 1 and 2 Quick starter Homework worksheet Homework quiz 10 1 7/8 2.12 Ionic bonding Represent an ionic bond with a diagram. Draw dot-and-cross diagrams for ionic compounds. Work out the charge on the ions of metals from the group number of the element. Practical sheet; Worksheet; Technician’s notes starter Homework worksheet Homework quiz Video 10 1 9/10 2.13 Ionic compounds (HT) Identify compounds from structures. Explain the limitations of diagrams and models. Work out the empirical formula of an ionic compound. (HT) Practical sheet; Worksheets 1, 2 and 3; Technician’s notes starter Homework worksheet Homework quiz 10 1 9/10 2.14 Properties of ionic compounds (HT) Describe the properties of ionic compounds. Relate their melting points to forces between ions. Explain when compounds can conduct electricity. (HT) Practical sheets 1 and 2; Worksheet; Technician’s 1 and 2 Quick starter Homework worksheet Homework quiz 10 1 9/10 2.15 Properties of small molecules Identify small molecules from formulae. Explain the strength of covalent bonds. Relate the intermolecular forces to the bulk properties of a substance. Worksheets 1 and 2 Quick starter Homework worksheet Homework quiz Video 10 1 9/10 2.16 Covalent bonding Identify single bonds in molecules and structures. Draw dot-and-cross diagrams for small molecules. Deduce molecular formulae from models and diagrams. Worksheets 1 and 2 Quick starter Homework worksheet Homework quiz Video
balanced equations Technician’s notes Presentation 10 2 3/4 Assessment End of chapter test Student Book End of chapter test Collins Connect Chapter 3: Chemical reactions (27 lessons) 10 2 3/4 3.1 Elements and compounds Identify symbols of elements from the periodic table. Recognise the properties of elements and compounds. Identify the elements in a compound. C3.1a Worksheets 1 and 2; Practical sheet; Technician notes Quick starter Homework worksheet Homework quiz Slideshow 10 2 3/4 3.2 Atoms, formulae and equations Learn the symbols of the first 20 elements in the periodic table. Use symbols to describe elements and compounds. Use formulae to write equations. C3.1b, c Worksheets 1, 2 and 3; Practical sheet; Technician’s notes; Presentation starter Homework worksheet Homework quiz Slideshow Video 10 2 5/6 3.3 Moles (HT only) Describe the measurements of amounts of substances in moles. Calculate the amount of in a given mass of a substance. Calculate the mass of a given number of moles of a substance. C3.1g–i Worksheets 1 and 2; Technician’s Quick starter Homework worksheet Homework quiz 10 2 5/6 3.4 Key concept: Conservation of mass and balanced equations Explore ideas about the conservation of mass. Consider what the numbers in equations stand for. Write balanced symbol equations. Key Concept C3.1d–f Worksheet; Technician’s notes; Presentation Quick starter Homework worksheet Homework quiz Slideshow
Investigate how these temperature changes can be controlled. Graph plotters 1 and 2 10 2 7/8 3.11 Reaction profiles (HT) Use diagrams to show the energy changes during reactions. Show the difference between exothermic and endothermic reactions using energy profiles. Find out why many reactions start only when energy or a catalyst is added. C3.2b, c Technician’s notes; Worksheets 1 and 2; Presentation Quick starter Homework worksheet Homework quiz Video 10 2 7/8 3.12 Energy change of reactions Identify the bonds broken and formed during a chemical reaction. Consider why some reactions are exothermic and others are endothermic. Use bond energies to calculate overall energy changes. C3.2d Technician’s notes; Worksheets 1 and 2; Presentation Quick starter Homework worksheet Homework quiz 10 2 9/10 3.13 Maths skill: Recognise and use expressions in decimal form Read scales in integers and using decimals. Calculate the energy change during a reaction. Calculate energy transferred for comparison. CM3.2 Practical sheet; Worksheet; Technician’s notes; Presentation Quick starter Homework worksheet Homework quiz 10 2 9/10 3.14 Oxidation and reduction in terms of electrons (HT) Observe some reactions between metal atoms and metal ions. Learn to write ionic equations and half equations. (HT) Classify half equations as oxidation or reduction. (HT) C3.3a, b Technician’s notes; Practical sheet; Worksheet; Presentations 1 and 2 starter Homework worksheet Homework quiz 10 2 9/10 3.15 Key concept: Electron transfer, oxidation and reduction (HT) Review ion formation. Classify half equations as oxidation or reduction. (HT) Review patterns in reactivity. (HT) Key Concept C3.3c Worksheet; Presentation starter Homework worksheet Homework quiz 10 2 9/10 3.16 Neutralisation of acids and salt production React an acid and an alkali to make a salt. Predict the formulae of salts. Write balanced symbol equations. C3.3d Technician’s notes; Practical sheet; Quick starter Homework worksheet
Worksheets 1 and 2 Homework quiz 10 2 9/10 3.17 Soluble salts React an acid and a metal to make a salt. Predict the formulae of salts. Write balanced symbol equations and half equations. Technician’s notes; Practical sheet; Worksheets 1 and 2; Presentation and 2 Quick starter Homework worksheet Homework quiz 10 2 11/12 3.18 Reaction of metals with (HT) React an acid and a metal to make a salt. Predict the formulae of salts. Write balanced symbol equations and half equations. Technician’s notes; Practical sheet; Worksheets 1 and 2; Presentations 1 and 2 starter Homework worksheet Homework quiz 10 2 11/12 3.19 Practical: Preparing a pure, dry sample of a soluble salt from an insoluble oxide or carbonate (HT) React a carbonate with an acid to make a salt. Describe each step in the procedure. Determine the purity of the product. PAG Technician’s Practical sheet; Presentations 1 and 2 Quick starter Homework worksheet Homework quiz 10 2 11/12 3.20 pH and neutralisation Estimate the pH of solutions. Identify weak and strong acids and alkalis. Investigate pH changes when a strong acid neutralises a strong alkali. C3.3g–k Technician’s 1, 2 and 3; Practical sheet; Worksheet; Presentation Quick starter Homework worksheet Homework quiz 10 2 11/12 3.21 Strong and weak acids (HT only) Explore the factors that affect the pH of an acid. Find out how the pH changes when an acid is diluted. Find out how the concentrations of solutions are measured. Worksheet Quick starter Homework worksheet Homework quiz
Video 10 2 11/12 3.22 Maths skill: Make order of magnitude calculations (HT only) Explore the factors that affect the acidity of rain. Find out how acid concentrations are compared. Explore the link between hydrogen ion concentration and pH. CM3.3 Technician’s notes; Practical sheet; Presentation Quick starter Homework worksheet Homework quiz 10 3 1/2 3.23 Practical: Investigate the variables that affect temperature changes in reacting solutions, such as, acid plus metals, acid plus carbonates, neutralisations, displacement of metals (HT) Devise a hypothesis. Devise an investigation to test your hypothesis. Decide whether the evidence supports your hypothesis. PAG Technician’s notes; Practical sheet; Presentation starter Homework worksheet Homework quiz 10 3 1/2 3.24 The process of electrolysis (HT) Explore what happens when a current passes through a solution of ions. Find out what an electrolyte is and what happens when it conducts electricity. Find out how electricity decomposes compounds. C3.4a Technician’s notes; Practical sheet; Worksheet; Presentation Quick starter Homework worksheet Homework quiz Slideshow Video 10 3 1/2 3.25 Electrolysis of molten ionic compounds (HT) Look in detail at the electrolysis of lead bromide. Communicate the science behind the extraction of elements from molten salts. Write balanced half equations for electrolysis reactions. (HT) C3.4b Worksheet; Presentation Quick starter Homework worksheet Homework quiz 10 3 1/2 3.26 Electrolysis of aqueous solutions Investigate the products formed when copper sulfate is electrolysed. Predict what products other solutions will give. Write half equations for reactions at electrodes. C3.4c–e Technician’s notes; Worksheet; Quick starter Homework worksheet Homework quiz
10 3 5/6 4.5 Reaction trends and predicting reactions Review the patterns in the periodic Compare the trends in Group 1 and Group 7. Relate these trends to the way atoms form ions. C4.1d Worksheet; Presentation starter Homework worksheet Homework quiz 10 3 5/6 4.6 Reactivity series (HT) Compare the reactivity of metals. Observe some reactions between atoms and metal ions. Consider why some metals are more reactive than others. C4.1e, f Practical sheet; Worksheet; Presentations 1 and 2 Quick starter Homework worksheet Homework quiz Slideshow 10 3 5/6 4.7 Tests for gases Recall the for four common gases. Identify the four common gases using these tests. Explain why limewater can be used to detect carbon dioxide. C4.2a Practical sheet; Technician’s notes; Presentation Quick starter Homework worksheet Homework quiz 10 3 5/6 4.8 hydroxides (HT) Recognise the precipitate colour of metal hydroxides. Explain how to use sodium hydroxide to test for ions. Write balanced equations for producing insoluble metal hydroxides. (HT) C4.2b–d Practical Worksheet; Technician’s notes starter Homework worksheet Homework quiz Slideshow 10 3 5/6 4.9 Tests for anions Identify the tests for carbonates. Explain the tests for halides and sulfates. Identify anions and cations from the results of tests. Practical sheets 1 and 2; Worksheet; Technician’s notes 1 and 2 Quick starter Homework worksheet Homework quiz 10 3 7/8 4.10 tests Carry out flame-test procedures. Identify the colours of flames of ions. Identify species from the results of the tests. C4.2e Practical Worksheet; Technician’s notes Quick starter Homework worksheet Homework quiz 10 3 7/8 4.11 Instrumental methods Identify advantages of instrumental methods compared with the chemical tests. Describe some instrumental techniques. Explain the data provided by instrumental techniques. C4.2f, g Worksheets 1 and 2 Quick starter Homework worksheet Homework quiz
Slideshow 10 3 7/8 4.12 Practical: Use chemical tests to identify the ions in unknown single ionic compounds Describe how to carry out experiments safely using the correct manipulation of apparatus for the qualitative analysis of ions. Make and record observations flame tests and precipitation methods. Identify unknown ions in chemical compounds. PAG Practical sheets 1 and 2; Technician’s notes Quick starter Homework worksheet Homework quiz 10 3 7/8 Assessment End of chapter test Student Book End of chapter test Collins Connect Chapter 5: Monitoring and controlling chemical reactions (20 lessons) 10 3 7/8 5.1 Concentration of solutions (HT only) Relate mass, volume and concentration. Calculate the mass of solute in solution. Relate concentration in mol/dm3 to mass and volume. C5.1a–c Practical sheet; Worksheet; Technician’s notes Quick starter Homework worksheet Homework quiz 10 3 9/10 5.2 Using concentrations of solutions (HT) Describe how to carry out titrations. Calculate concentrations in titrations in mol/dm3 and in g/dm3. (HT) Explain how the concentration of a solution in mol/dm3 is related to the mass of the mass of the solute and the volume of the solution. (HT) Practical sheet; Worksheet; Technician’s notes Quick starter Homework worksheet Homework quiz Slideshow 10 3 9/10 5.3 Practical: Finding the reacting volumes of solutions of acid and alkali by titration (HT) Use an acid to neutralise a volume of alkali. Use a burette to determine the volume of an acid needed. Use the results to determine the concentration of an alkali. (HT) Technician’s Practical sheet; Presentation and 2 Quick starter Homework worksheet Homework quiz 10 3 9/10 5.4 Amounts of substance in volumes of gases (HT only) Explain that the same amount of any gas occupies the same volume at room temperature and pressure (rtp). Calculate the volume of a gas at rtp from its mass and relative formula mass. C5.1d–f Practical sheet 3.12; Worksheet 3.12; starter Homework worksheet Homework quiz
See how a reactant’s temperature or concentration can affect this time. Investigate the effect of breaking up a solid reactant into smaller pieces. Practical sheet; Worksheets 1 and 2; Graph plotter 1; Presentation Homework quiz 10 3 11/12 5.11 Collision theory Find out about the collision theory. Use collision theory to make predictions about reaction rates. Relate activation energies to collision theory. C5.2d Worksheets 1 and 2; Presentations 1 and 2 Quick starter Homework worksheet Homework quiz 11 1 1/2 5.12 Catalysts Investigate catalysts. Find out how catalysts work. Learn how they affect activation energy. C5.2f–i Technician’s notes; Practical sheet; Worksheet Quick starter Homework worksheet Homework quiz Videos 11 1 1/2 5.13 Factors increasing the rate Interpret graphs. Consider what determines the reaction rate. Explore the effect of changing the amounts of reactants used. C5.2e Technician’s notes; Practical sheet; Worksheet; Presentation Quick starter Homework worksheet Homework quiz Slideshow 11 1 1/2 5.14 Practical: Investigate how changes in concentration affect the rates of reactions by a method involving the production of a gas and a method involving a colour change (HT) Devise a hypothesis. Devise an investigation to test a hypothesis. Decide whether the evidence supports a hypothesis. PAG Technician’s notes; Practical sheets 1 and 2; Presentations 1 and 2; Graph plotter 1 starter Homework worksheet Homework quiz 11 1 1/2 5.15 Reversible reactions and Investigate reversible reactions. Explore the energy changes in a reversible reaction. C5.3a Technician’s Quick starter
energy changes (HT) Find out how reaction conditions affect reversible (HT) reactions. Practical sheet; Worksheet; Presentation Homework worksheet Homework quiz 11 1 1/2 5.16 Equilibrium (HT) Recognise reactions that can reach equilibrium. Find out what happens to the reactants and products at equilibrium. Use Le Chatelier’s principle to make predictions. (HT) C5.3b Technician’s notes; Worksheet; Presentation Quick starter Homework worksheet Homework quiz 11 1 3/4 5.17 Changing concentration and equilibrium (HT only) Distinguish between reactants and products. Explore how changing their concentrations affects reversible reactions. Use Le Chatelier’s principle to make predictions about changing concentrations. C5.3c Technician’s notes; Worksheet; Presentation Quick starter Homework worksheet Homework quiz 11 1 3/4 5.18 Changing temperature and equilibrium (HT only) Distinguish between exothermic and endothermic forward reactions. Explore how changing the temperature affects reversible reactions. Use Le Chatelier’s principle to make predictions changing temperatures. Technician’s notes; Worksheets 1 and 2; Presentation starter Homework worksheet Homework quiz 11 1 3/4 5.19 Changing pressure and equilibrium (HT only) Recognise the number of product and reactant molecules in a reaction. Explore how changing the pressure affects reversible reactions. Use Le Chatelier’s principle to make predictions about changing pressures. Worksheet; Presentation starter Homework worksheet Homework quiz 11 1 3/4 5.20 Maths skills: Use the slope of a tangent as a measure of rate of change Practice drawing graphs. Use graphs to compare reaction rates. Use tangents to measure that change. CM5.3 Worksheets 1 and 2; Presentations 1 and 2 starter Homework worksheet Homework quiz Video 11 1 3/4 Assessment End of chapter test Student Book End of chapter test Collins Connect End of teaching block test Collins Connect
Chapter 6: Global Challenges (42 lessons) 11 1 5/6 6.1 Extraction of metals (HT) Find out where metals come from. Extract iron from its oxide using carbon. Consider how other metals are extracted from their ores. C6.1a, b Technician’s notes; Practical sheet; Worksheet; Presentation Quick starter Homework worksheet Homework quiz Slideshow 11 1 5/6 6.2 electrolysis to extract metals (HT) Review the connection between the reactivity series and the ways metals are extracted. Consider how aluminium is extracted from aluminium oxide. the oxidation and reduction reactions involved. (HT) Worksheet; Presentations 1 and 2 Quick starter Homework worksheet Homework quiz Slideshow 11 1 5/6 6.3 Alternative methods of metal extraction (HT only) Describe the process of phytomining. Describe the process of bioleaching. Evaluate alternative biological methods of metal extraction. (HT) C6.1c Practical Worksheets 1 and 2; Technician’s notes. starter Homework worksheet Homework quiz 11 1 5/6 6.4 The Haber process (HT) Apply principles of dynamic equilibrium to the Haber process. Use graphs to explain the trade off with rate and equilibrium. Explain how commercially used conditions relate to cost. (HT) C6.1d–g Practical sheet; Worksheets 1 and 2; Technician’s notes Quick starter Homework worksheet Homework quiz 11 1 5/6 6.5 Production and use of NPK fertilisers Describe how to make a fertiliser in the laboratory. Explain how fertilisers are produced industrially. Compare the industrial production with laboratory preparation. C6.1h Practical sheet; Worksheet; Technician’s notes Quick starter Homework worksheet Homework quiz 11 1 7/8 6.6 Life cycle assessment and recycling Describe the components of a life cycle assessment (LCA). C6.1i–l Worksheets 1 and 2 Quick starter Homework worksheet
Interpret LCAs of materials or products from information. Carry out a simple comparative LCA for shopping bags. Homework quiz 11 1 7/8 6.7 Ways of reducing the use of resources Describe ways of recycling and reusing materials. Explain why recycling, reusing and reducing are needed. Evaluate ways of reducing the use of limited resources. Worksheets 1 and 2. starter Homework worksheet Homework quiz Video 11 1 7/8 6.8 Alloys as useful materials Describe the composition of common alloys. Interpret the composition of other alloys from data. Evaluate the uses of other alloys. C6.1m Worksheets 1, 2 and 3 Quick starter Homework worksheet Homework quiz 11 1 7/8 6.9 Corrosion and its prevention Show that air and water are needed for rusting. Describe experiments and interpret results on rusting. Explain methods for preventing corrosion. C6.1n, o Practical sheets 1 and 2; Worksheets 1 and 2; Technician’s 1 and 2 starter Homework worksheet Homework quiz 11 1 7/8 6.10 Ceramics, polymers and composites Compare quantitatively properties of materials. Compare glass, ceramics, polymers, composites and metals. Select materials by relating properties to uses. C6.1p Worksheets 1, 2 and 3 Quick starter Homework worksheet Homework quiz Video 11 1 9/10 6.11 Maths skill: Translate information between graphical and numerical form Represent information from pie charts numerically. Represent information from graphs numerically. Represent numeric information graphically. CM6.1 Worksheets 1 and 2 Quick starter Homework worksheet Homework quiz Video
Draw diagrams of the formation of a polymer from an alkene. Relate the repeating unit of the polymer to the monomer. Homework worksheet Homework quiz 11 1 11/12 6.18 Condensation polymerisation (HT only) Explain the principles of condensation polymerisation. Explain the role of functional groups in producing a condensation polymer. Explain the structure of the repeating in a condensation polymer. Practical sheet; Worksheets 1 and 2; Technician’s notes Quick starter Homework worksheet Homework quiz 11 1 11/12 6.19 Amino acids Describe the functional of an amine. Identify the two functional groups of an amino acid. Explain how different amino acids build proteins. Worksheet Quick starter Homework worksheet Homework quiz 11 1 11/12 6.20 DNA and other naturally occurring polymers (HT) Describe the components of natural polymers. Explain the structure of proteins and carbohydrates. Explain how a molecule of DNA is constructed. (HT) C6.2h, i Worksheets 1 and 2 Quick starter Homework worksheet Homework quiz 11 2 1/2 6.21 oil, hydrocarbons and alkanes Describe why crude oil is a finite resource. Identify the hydrocarbons in the series of alkanes. Explain the structure and formulae of the alkanes. C6.2l–o Worksheets 1 and 2 Quick starter Homework worksheet Homework quiz 11 2 1/2 6.22 Fractional distillation and petrochemicals Describe how crude oil is used to provide modern materials. Explain how crude oil is separated by fractional distillation. Explain why the boiling points of the fractions are different. C6.2j, k Practical sheet; Worksheets 1 and 2; Technician’s notes Quick starter Homework worksheet Homework quiz Video 11 2 1/2 6.23 Properties of hydrocarbons Describe how different hydrocarbon fuels have different properties. Identify the properties that influence the use of Explain how the properties are related to the size of the molecules. Worksheets 1 and 2 starter Homework worksheet Homework quiz
11 2 1/2 6.24 Cracking and alkenes Describe the usefulness of cracking. Balance chemical equations as examples of cracking. Explain why modern life depends on the uses of hydrocarbons. Practical sheet; Worksheet Technician’s notes starter Homework worksheet Homework quiz Slideshow 1 Slideshow 2 11 2 1/2 6.25 Cells and batteries Make simple cells and measure their voltages. Consider the importance of cells and batteries. Find out how larger voltages can be produced. C6.2p Technician’s notes; Practical sheet; Worksheets 1 and 2 Quick starter Homework worksheet Homework quiz 11 2 3/4 6.26 Fuel cells (HT) Find out how fuel cells work. Compare and contrast the uses of hydrogen fuel cells, batteries and rechargeable cells. Learn what reactions take place inside hydrogen fuel cells. (HT) C6.2q Technician’s notes; Worksheet; Presentations 1 and 2 starter Homework worksheet Homework quiz Video 11 2 3/4 6.27 Key concept: Intermolecular forces Identify the bonds within a molecule and the forces between molecules. Explain changes of Explain how polymer structure determines its ability to stretch. Key Concept Worksheets 1 and 2 Quick starter Homework worksheet Homework quiz Video 11 2 3/4 6.28 Maths skills: Visualise and represent 3D models Use 3D models to represent hydrocarbons. Use 3D models to represent polymers. Use 3D models to represent large biological molecules. CM6.2 Worksheets 1 and 2 Quick starter Homework worksheet Homework quiz 11 2 3/4 6.29 Proportions of gases in the atmosphere Review the composition of the atmosphere. Measure the percentage of oxygen in the atmosphere. Consider why it the same. C6.3a Worksheets 1 and 2; Technician’s notes Quick starter Homework worksheet Homework quiz 11 2 3/4 6.30 The Earth’s early atmosphere Explore the origins of the Earth’s atmosphere. Worksheet Quick starter
11 2 7/8 6.37 Atmospheric pollutants from fuels Explore the products formed when fuels burn. Distinguish between complete and incomplete combustion. Write equations for complete and incomplete combustion. Worksheets 1, 2, 3 and 4; Technician’s notes; Presentation Quick starter Homework worksheet Homework quiz Slideshow 11 2 7/8 6.38 Properties and effects of atmospheric pollutants Review the hazards associated with air pollutants. Investigate correlations between pollutant emissions and deaths from asthma. Consider whether these support the hypothesis that air pollution makes asthma worse. Worksheets 1 and 2; Presentations 1 and 2 Quick starter Homework worksheet Homework quiz 11 2 7/8 6.39 Potable Distinguish between potable water and pure water. Describe the differences in treatment of ground water and salty water. Explain what is needed to provide potable for all. C6.3g–j Worksheets 1, 2 and 3; Technician’s notes Quick starter Homework worksheet Homework quiz Video 11 2 7/8 6.40 Waste water treatment Explain how water is treated. Describe how sewage is treated. Compare the ease of treating waste, ground and salt water. Worksheets 1, 2 and 3 Quick starter Homework worksheet Homework quiz Video 11 2 9/10 6.41 Practical: Analysis and purification of water samples from different sources, including pH, dissolved solids and distillation Describe how safety is managed, apparatus is used and accurate measurements are made. Recognise when sampling techniques need to be used and made representative. Carry out a procedure to produce potable water from salt solution. Evaluate methods and suggest possible improvements and further investigations. PAG Practical sheets 1 and 2; Worksheet; Technician’s Quick starter Homework worksheet Homework quiz 11 2 9/10 6.42 Maths skills: Use ratios, fractions and percentages Consider ways of comparing the amounts of gases in the atmosphere. Review what balanced symbol equations show. Compare the yields in chemical reactions. CM6.3 Worksheets 1 and 2; Technician’s notes; Presentation Quick starter Homework worksheet Homework quiz