9 1 5/6 1.7 Maths skills: Standard form and making estimates Consider the sizes of particles. Use numbers in standard form to compare sizes. Use numbers in standard form in calculations. CM1.2 Worksheet; Technician’s notes; Presentation Quick starter Homework worksheet Homework quiz Video 9 1 5/6 Assessment End of chapter test Student Book End of chapter test Collins Connect Chapter 2: Elements, compounds and mixtures (28 lessons) 9 1 5/6 2.1 Key concept: Pure substances Describe, explain and exemplify processes of separation. Suggest separation and purification techniques for mixtures. Distinguish pure and impure substances using melting point and boiling point data. C2.1a, b Practical sheets 1 and 2; Worksheets 1 and 2; Technician’s notes 1 and 2 Quick starter Homework worksheet Homework quiz 9 1 7/8 2.2 Relative formula mass Review the differences between the isotopes of an element. Distinguish between the mass of an atom and the relative atomic mass of an element. Use relative atomic masses to calculate relative formula masses. C2.1c Worksheets 1, 2 and 3; Technician’s notes; Presentation Quick starter Homework worksheet Homework quiz 9 1 7/8 2.3 Mixtures Recognise that all substances are chemicals. Understand that mixtures can be separated into their components. Suggest suitable separation and purification techniques for mixtures. C2.1d Worksheets 1 and 2; Practical sheet; Technician’s notes Quick starter Homework worksheet Homework quiz 9 1 7/8 2.4 Formulations Identify formulations given appropriate information. Explain the particular purpose of each chemical in a mixture. Explain how quantities are carefully measured for formulation. C2.1e Worksheets 1 and 2 Quick starter Homework worksheet Homework quiz
9 2 5/6 2.17 Giant covalent structures Recognise giant covalent structures from diagrams. Explain the properties of giant covalent structures. Recognise the differences in different forms of carbon. Practical Worksheets 1 and 2; Technician’s notes Quick starter Homework worksheet Homework quiz 9 2 5/6 2.18 Polymer structures (HT) Recognise polymers from their unit formulae. Explain why some polymers can stretch. Explain why some plastics do not soften on heating. (HT) Practical sheet; Worksheet; Technician’s notes Quick starter Homework worksheet Homework quiz 9 2 5/6 2.19 Metallic bonding (HT) Describe that metals form giant structures. Explain how metal ions are held together. Explain the delocalisation of electrons. (HT) Practical sheet; Worksheets 1 and 2; Technician’s notes starter Homework worksheet Homework quiz Video 9 2 7/8 2.20 Properties of metals and alloys Identify metal elements and their properties, and metal alloys. Describe the purpose of a tin–lead Explain why alloys have different properties to those of elements. Practical sheet; Worksheets 1 and 2; Technician’s notes starter Homework worksheet Homework quiz Slideshow 1 Slideshow 2 9 2 7/8 2.21 Key concept: The outer electrons Review the patterns in the periodic table. Compare the trends in 1 and 7. Relate these trends to the number of outer electrons and the sizes of atoms. Worksheet; Technician’s Presentation Quick starter Homework worksheet Homework quiz 9 2 7/8 Assessment End of teaching block test Collins Connect 9 2 9/10 2.22 The periodic table Explain how the electronic structure of atoms follows a pattern. Recognise that the number of electrons in an element’s atoms outer shell corresponds to the element’s group number. Use the periodic table to make predictions. C2.2i Worksheets 1, 2 and 3; Presentation Quick starter Homework worksheet Homework quiz Video
9 2 9/10 2.23 Developing the periodic table Find out how the periodic table has changed over the years. Explore Mendeleev’s role in its development. Consider the accuracy of Mendeleev’s predictions. Worksheets 1 and 2; Technician’s notes; Presentation Quick starter Homework worksheet Homework quiz 9 2 9/10 2.24 Diamond Identify why diamonds are so hard. Explain how the properties relate to the bonding in diamond. Explain why diamond differs from graphite. C2.3a–f Worksheet Quick starter Homework worksheet Homework quiz Slideshow Video 9 2 11/12 2.25 Graphite Describe the structure and bonding of graphite. Explain the properties of graphite. Explain the similarity to Worksheets 1 and 2 starter Homework worksheet Homework quiz Video 9 2 11/12 2.26 Fullerenes and graphene Describe the structure of graphene. Explain the structure and uses of the fullerenes. Explain the structure of nanotubes. Worksheets 1 and 2 Quick starter Homework worksheet Homework quiz Video 9 2 11/12 2.27 Nanoparticles, their properties and uses Relate the of nanoparticles to atoms and molecules. Explain that there may be risks associated with nanoparticles. Evaluate the use of nanoparticles for a specific purpose. C2.3g–j Worksheets 1, 2 and 3; Technician’s notes Quick starter Homework worksheet Homework quiz 9 3 1/2 2.28 Maths skills: Using ratios in mixture, empirical formulae and Consider ways of comparing the amounts of in the atmosphere. Review what balanced symbol equations show. Compare the yields in chemical reactions. CM1 Worksheets 1and 2 Quick starter Homework worksheet Homework quiz Slideshow
balanced equations Technician’s notes Presentation 9 3 1/2 Assessment End of chapter test Student Book End of chapter test Collins Connect Chapter 3: Chemical reactions (27 lessons) 9 3 1/2 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 starter Homework worksheet Homework quiz Slideshow 9 3 3/4 3.2 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 Quick starter Homework worksheet Homework quiz Slideshow 9 3 3/4 3.3 Moles (HT only) Describe the measurements of amounts of substances in moles. Calculate the amount of moles in a given mass of a substance. Calculate the mass of a number of moles of a substance. C3.1g–i Worksheets 1 and 2; Technician’s notes starter Homework worksheet Homework quiz 9 3 3/4 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 starter Homework worksheet Homework quiz Slideshow Video
Investigate how these temperature changes can be controlled. Graph plotters 1 and 2 9 3 9/10 3.11 Reaction profiles Use diagrams to show the energy changes during reactions. Show the difference between exothermic and endothermic reactions 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 9 3 9/10 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 9 3 9/10 3.13 Maths skill: Recognise and use expressions in decimal form Read scales in integers and 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 9 3 11/12 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 Quick starter Homework worksheet Homework quiz 9 3 11/12 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 9 3 11/12 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
Video 10 1 3/4 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 1 5/6 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 Practical sheet; Presentation Quick starter Homework worksheet Homework quiz 10 1 5/6 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 1 5/6 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 Write balanced half equations for electrolysis reactions. (HT) C3.4b Worksheet; Presentation Quick starter Homework worksheet Homework quiz 10 1 7/8 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 1 11/12 4.5 Reaction trends and predicting reactions Review the patterns in the periodic table. Compare the trends in 1 and Group 7. Relate these trends to the way atoms form ions. C4.1d Worksheet; Presentation Quick starter Homework worksheet Homework quiz 10 1 11/12 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 starter Homework worksheet Homework quiz Slideshow 10 2 1/2 4.7 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 2 1/2 4.8 Metal hydroxides (HT) Recognise the precipitate colour of hydroxides. Explain how to use sodium hydroxide to test for metal ions. Write balanced equations for producing insoluble metal hydroxides. (HT) C4.2b–d Practical sheet; Worksheet; Technician’s notes Quick starter Homework worksheet Homework quiz Slideshow 10 2 1/2 4.9 Tests for anions Identify the tests for carbonates. Explain the for halides and sulfates. Identify anions and cations from the results of Practical sheets 1 and 2; Worksheet; Technician’s 1 and 2 Quick starter Homework worksheet Homework quiz 10 2 3/4 4.10 Flame tests out flame-test procedures. Identify the colours of flames of ions. Identify species from the results of the C4.2e Practical sheet; Worksheet; Technician’s notes Quick starter Homework worksheet Homework quiz 10 2 3/4 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 starter Homework worksheet Homework quiz
Slideshow Video 10 2 3/4 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 starter Homework worksheet Homework quiz 10 2 5/6 Assessment End of chapter test Student Book End of chapter test Collins Connect Chapter 5: Monitoring and controlling chemical reactions (20 lessons) 10 2 5/6 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 2 5/6 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 2 7/8 5.3 Practical: Finding the reacting volumes of solutions of acid and alkali by titration (HT) Use an acid to neutralise a known 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 notes; Practical sheet; Presentation and 2 Quick starter Homework worksheet Homework quiz 10 2 7/8 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; Quick starter Homework worksheet Homework quiz Video
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 Video 10 2 11/12 5.11 Collision theory Find out about the collision theory. Use collision theory to make predictions reaction rates. Relate activation energies to collision theory. C5.2d Worksheets 1 and 2; Presentations 1 and 2 Quick starter Homework worksheet Homework quiz 10 3 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 10 3 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 10 3 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 Practical sheets 1 and 2; Presentations 1 and 2; Graph plotter 1 Quick starter Homework worksheet Homework quiz 10 3 3/4 5.15 Reversible reactions and Investigate reversible reactions. Explore the energy changes in a reversible reaction. C5.3a Technician’s notes; starter
energy changes (HT) Find out how reaction conditions affect reversible reactions. (HT) Practical sheet; Worksheet; Presentation Homework worksheet Homework quiz 10 3 3/4 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 10 3 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 10 3 5/6 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 about changing temperatures. Technician’s notes; Worksheets 1 and 2; Presentation Quick starter Homework worksheet Homework quiz 10 3 5/6 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 Quick starter Homework worksheet Homework quiz 10 3 5/6 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 Use tangents to measure rates that change. CM5.3 Worksheets 1 and 2; Presentations 1 and 2 Quick starter Homework worksheet Homework quiz Video 10 3 7/8 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) 10 3 7/8 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 10 3 7/8 6.2 Using 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. Learn the oxidation and reduction reactions involved. (HT) Worksheet; Presentations 1 and 2 Quick starter Homework worksheet Homework quiz Slideshow 10 3 9/10 6.3 Alternative methods of metal extraction (HT) Describe the process of phytomining. Describe the process of bioleaching. Evaluate alternative biological methods of metal extraction. (HT) C6.1c Practical sheet; Worksheets 1 and 2; Technician’s notes. Quick starter Homework worksheet Homework quiz 10 3 9/10 6.4 The Haber process (HT) 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 starter Homework worksheet Homework quiz 10 3 9/10 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 10 3 11/12 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. out a simple comparative LCA for shopping bags. Homework quiz 10 3 11/12 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. Quick starter Homework worksheet Homework quiz Video 10 3 11/12 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 starter Homework worksheet Homework quiz 11 1 1/2 6.9 Corrosion and its prevention Show that air and 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 notes 1 and 2 Quick starter Homework worksheet Homework quiz Video 11 1 1/2 6.10 Ceramics, polymers and composites Compare quantitatively properties of materials. Compare glass, ceramics, polymers, composites and metals. Select materials by relating their properties to uses. C6.1p Worksheets 1, 2 and 3 starter Homework worksheet Homework quiz Video 11 1 1/2 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
11 1 3/4 6.12 Function groups and homologous series Identify the first four hydrocarbons in the alkane series. Name the first four compounds in homologous series. Identify the functional group of a series. C6.2a, C6.2b Worksheet Quick starter Homework worksheet Homework quiz 11 1 3/4 6.13 Structure and formulae of alkenes Describe the difference between an alkane and an alkene. Draw the displayed structural formulae for the first four members of the alkenes. Explain why alkenes are called unsaturated molecules. Worksheets 1 and 2 Quick starter Homework worksheet Homework quiz 11 1 3/4 6.14 Reaction of alkenes Describe the addition reactions of alkenes. Draw the full displayed structural formulae of the products alkenes make. Explain how alkenes react with hydrogen, water and the halogens. Practical Worksheets 1 and 2; Technician's notes starter Homework worksheet Homework quiz 11 1 5/6 6.15 Alcohols Recognise alcohols from name or from given formulae. Describe the conditions used for the fermentation of using yeast. Write balanced chemical equations for the combustion of alcohols. Practical sheets 1 and 2; Worksheets 1 and 2; Technician's notes Quick starter Homework worksheet Homework quiz 11 1 5/6 6.16 Carboxylic acids Describe the reactions of carboxylic acids. Recognise carboxylic acids from their formulae. Explain the reaction of ethanoic acid with an alcohol. Practical sheet; Worksheets 1 and 2; Technician's notes Quick starter Homework worksheet Homework quiz 11 1 5/6 6.17 Addition polymerisation Recognise addition polymers and monomers from diagrams. C6.2a–g Worksheets 1 and 2 starter
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 7/8 6.18 Condensation polymerisation (HT only) Explain the basic principles of condensation polymerisation. Explain the role of functional groups in producing a condensation polymer. Explain the structure of the repeating units in a condensation polymer. Practical sheet; Worksheets 1 and 2; Technician’s notes Quick starter Homework worksheet Homework quiz 11 1 7/8 6.19 Amino acids Describe the functional group of an amine. Identify the two functional groups of an acid. Explain how different acids build proteins. Worksheet starter Homework worksheet Homework quiz 11 1 7/8 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 1 9/10 6.21 Crude 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 1 9/10 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 1 9/10 6.23 Properties of hydrocarbons Describe how different hydrocarbon have different properties. Identify the properties that influence the use of fuels. Explain how the properties are related to the size of the molecules. Worksheets 1 and 2 Quick starter Homework worksheet Homework quiz Video
11 2 7/8 6.37 Atmospheric pollutants from fuels Explore the products formed when 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 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 9/10 6.39 Potable Distinguish between potable water and pure water. Describe the differences in treatment of ground and salty water. Explain what is needed to provide potable water for all. C6.3g–j Worksheets 1, 2 and 3; Technician’s notes Quick starter Homework worksheet Homework quiz Video 11 2 9/10 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 notes Quick starter Homework worksheet Homework quiz 11 2 11/12 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 Video