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Revision help links OCR GCSE Gateway Combined Science chemistry PAPER 2
Revision summary help for OCR GCSE 9-1 Gateway Combined Science A 2nd chemistry A exam paper - learning objectives for exam papers (re-edit) OCR Level 1/2 GCSE (Grade 9-1) in Combined Science A (Gateway Science) (J250) FT Paper 4/HT Paper 10 Chemistry - OCR (Grade 9-1) Gateway GCSE Combined Science chemistry Topic C4 "Predicting and identifying reactions and products:", Topic C5 "Monitoring and controlling chemical reactions", Topic C6 "Global challenges", Topic CS7 "Practical skills" for Gateway combined science 2020 chemistry exam papers onwards LINK GCSE Gateway Combined Science 1st chemistry paper C1-3, CS7 LINK OCR Gateway Science GCSE CHEMISTRY A 1st paper C1-3, CS7 LINK for OCR Gateway Science GCSE CHEMISTRY A 2nd paper C1-C7 This is a BIG website, you need to take time to explore it [SEARCH BOX] Use your mobile phone 'landscape' orientation? See also OCR 21st Century Sciences B Revision Links email doc brown - query? or comment? For ALL other exam papers, use and bookmark the link below
Syllabus-specification CONTENT INDEX of revision summary notes Summaries for OCR Gateway Science A GCSE 9-1 Combined Science FT Paper 3/HT Paper 9 (separate page) What is assessed in this paper? (for OCR 9-1 GCSE Gateway Combined Science - chemistry topics) The 1st chemistry paper assesses Topics C1, C2, C3 and CS7 Revision SUMMARY of Topic C1: Particles: Containing sections Revision SUMMARY of Topic C2: Elements, compounds and mixtures: Containing sections C2.1 Purity and separating mixtures, Revision SUMMARY of Topic C3: Chemical reactions: Containing sections C3.1 Introducing chemical reactions, C3.3 Types of chemical reactions, OCR Gateway Science GCSE 9-1 Combined Science A FT Paper 4/HT Paper 10 (this page) What is assessed in this paper? (for OCR 9-1 GCSE Gateway Combined Science - chemistry topics) 2nd chemistry paper assesses Topics C4, C5, C6 and CS7, BUT assumes knowledge of Topics C1, C2, C3 Revision SUMMARY of Topic C4: Predicting and identifying reactions and products: Containing sections C4.1 Predicting chemical reactions Revision SUMMARY of Topic C5: Monitoring and controlling chemical reactions: Containing sections C5.1 Controlling reactions (Topic 5.1 Combined science) C5.2 Equilibria (Topic 5.2 Combined science) Revision SUMMARY of Topic C6: Global challenges: Containing sections C6.1 Improving processes & products, C6.2 Interpreting & interacting with Earth systems
Topic C4 Predicting and identifying reactions and products (Revision for OCR Gateway Science GCSE 9-1 Combined Science A, 2nd chemistry paper Topic C4 "Predicting and identifying reactions and products", papers 4/10) The 2nd chemistry paper assesses Topics C4, C5, C6 and CS7, BUT assumes knowledge of Topics C1, C2 and C3 OCR Gateway Science GCSE 9-1 Combined Science Chemistry Topic C4 "Predicting and identifying reactions and products" quiz content for chemistry: periodic table, group 1 alkali metals, group 7 halogens, group 0 noble gases, chemical tests for gases, reactivity series of metals (higher tier HT/foundation tier FT)
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HT = higher tier (harder - usually more theory & depth) and FT = foundation tier (easier) 1st drafts Gateway chemistry quizzes C4.1 Predicting chemical reactions (Revision for OCR Gateway Science GCSE 9-1 Combined Science A, 2nd chemistry paper Topic C4 "Predicting and identifying reactions and products") Models of how substances react and the different types of chemical reactions that can occur enable us to predict the likelihood and outcome of a chemical reaction. The current Periodic Table was developed based on observations of the similarities and differences in the properties of elements. The way that the Periodic Table is arranged into groups and periods reveals the trends and patterns in the behaviour of the elements. The model of atomic structure provides an explanation for trends and patterns in the properties of elements. The arrangement of elements in groups and periods reveals the relationship between observable properties and how electrons are arranged in the atoms of each element. You should be familiar with the principles underpinning the Mendeleev Periodic Table; the Periodic Table: periods and groups; metals and non-metals; the varying physical and chemical properties of different elements; the chemical properties of metals and non-metals; the chemical properties of metal and non-metal oxides with respect to acidity and how patterns in reactions can be predicted with reference to the Periodic Table. Don't confuse state changes and dissolving with chemical changes and realise that solid products of an oxidation reaction have more mass than the starting solid. Periodic Table Notes - an overview, groups, periods, metals & non-metals Revision Notes Word-fill quiz "The Periodic Table and Electronic Structure" * Word-fill quiz "Spot the element in the Periodic Table" Word-fill quiz "Recognise the element and its use" C4.1a Know the simple properties of Groups 1, 7 and 0 including physical and chemical properties.
C4.1b Be able to explain how observed simple properties of Groups 1, 7 and 0 depend on the outer shell of electrons of the atoms (relate chemistry to ease of electron gain or loss) and predict properties from given trends down the groups e.g. physical property and chemical properties and reactivity trends. Group 1 Alkali Metals Revision Notes Multiple choice quiz on the Group 1 Alkali Metals Word-fill worksheet on the Group 1 Alkali Metals Group 7 Halogens - physical and chemical properties Revision Notes Multiple choice quiz on the Group 7 Halogens A Group 7 "Halogens" task sheet worksheet * (answers) Word-fill work sheet on the Halogens The Halogens (matching pair quiz on their appearance) Group 0 Noble Gases Revision Notes Multiple choice quiz on Group 0 The Noble Gases Wordfill worksheet on the Noble Gases (answers) Structured question on the reactivity of elements and the periodic table and answers C4.1c Be able to predict possible reactions and probable reactivity of elements from their positions in the Periodic Table Periodic Table Notes - an overview, groups, periods, metals & non-metals Revision Notes Multiple choice quiz on the basics of the Periodic Table Task sheet worksheet on Periodic Table history * (answers) Basic Periodic Table Task sheet worksheet * (answers) Gap-fill worksheet on the Periodic Table Structured question on the reactivity of elements and the periodic table and answers See also the links to Groups 1, 7 and 0 above for C4.1b Word-fill quiz "The Periodic Table and Electronic Structure" * Word-fill quiz "Spot the element in the Periodic Table" Word-fill quiz "Recognise the element and its use" 2nd Word-fill quiz "The Group 1 Alkali Metals" * 2nd Word-fill quiz "The Group 7 Halogens" * 2nd Wordfill Quiz on the Noble Gases (answers) * 3rdd Word-fill quiz "The Group 0 Noble Gases" * C4.1d Be able to explain how the reactivity of metals with water or dilute acids is related to the tendency of the metal to form its positive ion.
C4.1e Be able to deduce an order of reactivity of metals based on experimental results.
The Reactivity Series of Metals Revision Notes Metal Reactivity Series Experiments-Observations Revision Notes Structured question on the 'Reactivity of Metals' and answers
Topic C5 Monitoring and controlling chemical reactions (Revision for OCR Gateway Science GCSE 9-1 Combined Science A, 2nd chemistry paper Topic C5 "Monitoring and controlling chemical reactions") OCR Gateway Science GCSE 9-1 Combined Science Chemistry Topic C5 "Monitoring and controlling chemical reactions" quiz content for chemistry: reversible reactions and chemical equilibrium, rates of chemical reaction factors - effect of changing pressure, concentration, temperature, using a catalyst (HT only) applying Le Chatelier's principle to predict equilibrium position changes (higher tier HT/foundation tier FT)
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HT = higher tier (harder - usually more theory & depth) and FT = foundation tier (easier) 1st drafts Gateway chemistry quizzes C5.1 Controlling reactions (Revision for OCR Gateway Science GCSE 9-1 Combined Science A, 2nd chemistry paper Topic C5 "Monitoring and controlling chemical reactions") Know that the rate and yield of a chemical reaction can be altered by changing the physical conditions. You should be familiar with the action of catalysts in terms of rate of reaction. You should know the term surface area and what it means. Common misconceptions - misinterpreting rate graphs and think that catalysts in taking part in reaction and run out/get used up. You need to be able to draw and interpret appropriate graphs from data to determine rate of reaction, determining gradients of graphs as a measure of rate of change to determine rate. All help links at the end of section C5.1 C5.1a Be able to suggest practical methods for determining the rate of a given reaction. Rate of reaction experiments - disappearing cross experiment, reacting magnesium and acid or marble chip and acid. C5.1b Be able to interpret rate of reaction graphs. 1/t is proportional to rate and gradients of graphs (not order of reaction).
C5.1c Be able to describe the effect of changes in temperature, concentration, pressure, and surface area on rate of reaction.
C5.1d Be able to explain the effects on rates of reaction of changes in temperature, concentration and pressure in terms of frequency and energy of collision between particles.
C5.1e Be able to explain the effects on rates of reaction of changes in the size of the pieces of a reacting solid in terms of surface area to volume ratio. C5.1f Be able to describe the characteristics of catalysts and their effect on rates of reaction. C5.1g Be able to identify catalysts in reactions.
C5.1h Be able to explain catalytic action in terms of activation energy reaction profile C5.1i Know that enzymes act as catalysts in biological systems. What do we mean by the rate/speed of reaction? how can we measure it? Revision Notes Particle model of the collision theory of chemical reaction rate factors Revision Notes Effect of changing reactant concentration in solution Revision Notes Effect of changing pressure in reacting gases Revision Notes Effect of changing particle size/surface area & stirring of a solid reactant Revision Notes Effect of changing the temperature of reactants Revision Notes Effect of using a catalyst in a chemical reaction Revision Notes Catalysts and activation energy Revision Notes Examples of graphs of rate data, interpretation Revision Notes Enzymes and Biotechnology Revision Notes Multiple choice Quiz on the Rates of Chemical Reactions Crossword on Rates of Reactions * Answers Wordfill worksheet on Rates of Chemical Reactions 2nd Word-fill quiz "What factors Affect the Speed of a Chemical reaction?" * (1) matching pair quizzes on Rates of Chemical Reactions and (mp2)
C5.2 Equilibria (Revision for OCR Gateway Science GCSE 9-1 Combined Science A, 2nd chemistry paper Topic C5 "Monitoring and controlling chemical reactions") Know that in a reaction, when the rate of the forward reaction equals the rate of the backwards reaction, the reaction in a closed system is said to be in equilibrium. You should be familiar with representing chemical reactions using formulae and using equations. Common misconceptions - you may not recognise that when a dynamic equilibrium is set up in a reaction the concentration of the reactants and products remain constant, you may think that they are equal. Also, you might think a dynamic equilibrium as two reactions. C5.2a Know that some reactions may be reversed by altering the reaction conditions. C5.2b Know that dynamic equilibrium occurs in a closed system when the rates of forward and reverse reactions are equal. C5.2c (HT only) Be able to predict the effect of changing reaction conditions on equilibrium position and be able to suggest appropriate conditions to produce as much of a particular product as possible.
Reversible Reactions - experiments described and explained Revision Notes Reversible reactions and chemical equilibrium (including Le Chatelier's Principle rules) Revision Notes The Haber Synthesis of ammonia (application of rules to an important industrial process)
Topic C6 Global challenges (Revision for OCR Gateway Science GCSE 9-1 Combined Science A, 2nd chemistry paper Topic C6 "Global challenges") This topic seeks to integrate your knowledge and understanding of chemical systems and processes, with the aim of applying it to global challenges. Applications of chemistry can be used to help humans improve their own lives and strive to create a sustainable world for future generations, and these challenges are considered in this topic. Many concepts you have learned through your chemistry course are brought together to look at particular problems and their solution. OCR Gateway Science GCSE 9-1 Combined Science Chemistry Topic C6 "Global challenges" quiz content for chemistry: (HT only), (higher tier HT/foundation tier FT)
for HT/FT students
HT = higher tier (harder - usually more theory & depth) and FT = foundation tier (easier) C6.1 Improving processes and products (Revision for OCR Gateway Science GCSE 9-1 Combined Science A, 2nd chemistry paper Topic C6 "Global challenges") Appreciate that historically new materials have been developed through trial and error, experience etc. but as our understanding of the structure of materials and chemical processes has improved we are increasing our ability to manipulate and design new materials. Industry is continually looking to make products that have a better performance and are sustainable to produce. This section also explores the extraction of raw materials and their use in making new products. You should be familiar with the properties of ceramics, polymers and composites. You also will have met the method of using carbon to obtain metals from metal oxides. Common misconceptions - you often think that chemical reactions will continue until all the reactants are exhausted and that equilibrium is a static condition. C6.1a Be able to explain, using the position of carbon in the reactivity series, the principles of industrial processes used to extract metals, including extraction of a non-ferrous metal.
Introduction to Metal Extraction Revision Notes Introduction to oxidation and reduction theory Revision Notes Extraction and Purification of Copper Revision Notes Gap–word–fill exercise on metal extraction 2nd Word-fill quiz "Extracting metals from their ores" * 3rd Word-fill quiz "Extraction of Iron" C6.1b Be able to explain why and how electrolysis is used to extract some metals from their ores. Practical - electrolysis of aqueous sodium chloride solution and aqueous copper sulfate solution. Introduction to electrolysis - electrolytes, non-electrolytes, electrode equations Revision Notes Electrolysis of sodium chloride solution (brine) Revision Notes Electrolysis of molten lead(II) bromide (and other molten ionic compounds like NaCl) Revision Notes Electrolysis of copper(II) sulfate solution Revision Notes Extraction of Aluminium Revision Notes C6.1c (HT only) Be able to evaluate alternative biological methods of metal extraction including bacterial and phytoextraction. Copper extraction by phytomining or bioleaching Revision Notes Making a soluble salt by neutralising a soluble acid with a soluble base (alkali) Revision Notes C6.1d Be able to describe the basic principles in carrying out a life-cycle assessment of a material or product C6.1e Be able to interpret data from a life-cycle assessment of a material or product. C6.1f Be able to describe a process where a material or product is recycled for a different and explain why this is viable. C6.1g Be able to evaluate factors that affect decisions on recycling. Chemical & Pharmaceutical Industry - Economics & Sustainability, Life Cycle Assessment, Recycling Notes Products of the Chemical & Pharmaceutical Industries & Impact on Us and the Environment Revision Notes Economic & environmental issues on mineral extraction & reasons for recycling and methods Revision Notes C6.1h Be able to describe the separation of crude oil by fractional distillation. Know the names of the fractions. C6.1i Be able to explain
the separation of crude oil by fractional distillation - relate to
molecular size and intermolecular forces C6.1k Be able to recall that crude oil is a main source of hydrocarbons and is a feedstock for the petrochemical industry. C6.1l Be able to explain how modern life is crucially dependent upon hydrocarbons and recognise that crude oil is a finite resource. C6.1m Be able to describe the production of materials that are more useful by cracking - including the conditions and reasons for cracking and some of the useful materials produced. Fractional distillation of crude oil & uses of fractions Revision Notes Alkanes - saturated hydrocarbons, structure and reactions including combustion Revision Notes Cracking - a problem of supply and demand, other products Revision Notes Multiple choice QUIZ on Oil Products - hydrocarbon chemistry Word-fill quiz "Crude Oil and its Fractional distillation" Word-fill quiz "Getting products from crude oil" Word-fill quiz "The Uses of the Fractions from Crude Oil" Word-fill quiz "More on hydrocarbon molecules" Word-fill quiz "Cracking Oil to make Alkanes and Alkenes" Word-fill quiz "Cracking oil fractions and uses of products" Word-fill quiz "Cracking, fuels and polymers" Word-fill quiz "More on uses of products from cracking"
C6.2 Interpreting and interacting with Earth systems (Revision for OCR Gateway Science GCSE 9-1 Combined Science A, 2nd chemistry paper Topic C6 "Global challenges") Appreciate as our understanding of the structure of materials and chemical processes has improved we are increasing our ability to interpret and understand biological and earth systems. Understanding how we interact with them is very important to our survival as a species. This section starts with the history of the atmosphere and moves on to how human activity could be affecting its composition. You should have some understanding of the composition of the Earth, the structure of the Earth, the rock cycle, the carbon cycle, the composition of the atmosphere and the impact of human activity on the climate. Common misconceptions - the atmosphere is large and that small increases of carbon dioxide or a few degree of temperature change do not make a difference to the climate, you may consider that global warming is caused by the ozone hole and that human activities alone cause the greenhouse effect. C6.2a interpret evidence for how it is thought the atmosphere was originally formed - knowledge of how the composition of the atmosphere has changed over time C6.2b Be able to describe how it is thought an oxygen-rich atmosphere developed over time. Past ancient atmospheres, changes due to man's activities Revision Notes Evolution of atmosphere - changes over billions of years, origin of life Revision Notes Word-fill quiz "The Earth's Atmosphere" * Word-fill quiz "The Composition of the Earth's Atmosphere" Word-fill quiz "The Evolution of the Earth's Atmosphere" Word-fill quiz "More on the formation of the Earth's atmosphere" Word-fill quiz "Later developments of the Earth's atmosphere" C6.2c Be able to describe the greenhouse effect in terms of the interaction of radiation with matter within the atmosphere C6.2d Be able to evaluate the evidence for additional anthropogenic (human activity) causes of climate change and be able to describe the uncertainties in the evidence base - the correlation between change in atmospheric carbon dioxide concentration and the consumption of fossil fuels C6.2e Be able to describe the potential effects of increased levels of carbon dioxide and methane on the Earth’s climate and how these effects may be mitigated - consideration of scale, risk and environmental implications. Recycling of gases - carbon cycle, global warming, oxygen balance and photosynthesis Revision Notes Greenhouse effect, global warming, climate change, carbon footprint from fossil fuel burning C6.2f Be able to describe the major sources of carbon monoxide, sulfur dioxide, oxides of nitrogen and particulates in the atmosphere and be able to explain the problems caused by increased amounts of these substances Air pollution - sulfur oxides, nitrogen oxides, acid rain Revision Notes Air pollution - incomplete combustion, carbon monoxide & soot Revision Notes Word-fill quiz "Air pollution and the Earth's atmosphere" Word-fill quiz "Making sense of air pollution data" C6.2g Be able to describe the principal methods for increasing the availability of potable water in terms of the separation techniques - ease of treatment of waste, ground and salt water. Water cycle, potable water, water treatment, pollution, tests for ions in water Revision Notes
CS7 Practical skills (Revision for OCR Gateway Science GCSE 9-1 Combined Science A, 2nd chemistry paper Topic CS7 "Practical skills", papers 4/10) ALL OCR GCSE (Grade 9-1) Level 1/Level 2 GATEWAY SCIENCE A specifications and syllabus revision summary links OCR (Grade 9-1) GCSE Gateway science BIOLOGY A 1st GCSE BIOLOGY paper (separate science Topics B1-3) OCR (Grade 9-1) GCSE Gateway science BIOLOGY A 2nd GCSE BIOLOGY paper (separate science Topics B4-6) OCR (Grade 9-1) GCSE Gateway science PHYSICS A 1st GCSE PHYSICS paper (separate science Topics P1-4) OCR (Grade 9-1) GCSE Gateway science PHYSICS A 2nd GCSE PHYSICS paper (separate science Topics P5-8)
Watch out for HT Only sections AND make sure you know exactly which GCSE science course you are doing! See also OCR 21st Century Sciences B Revision Links online fashion brands, Abercrombie & Fitch, Old Navy, Free People, Rue 21, Pacsun, OCR GCSE 9-1 Gateway Combined Science A Paper 4 Paper 10 Chemistry past exam papers 2018 2019 2020 2021 2022 Topics C4 Predicting & identifying reactions & products C5 Monitoring and controlling chemical reactions C6 Global challenges revision notes Ralph Lauren, Gini & Jony, United Colors of Benetton, 612 League, Little Kangaroos, Ajio, Nauti Nati, Babyhug, Allen Solly Junior, YK, Next, jobs and opportunities for teenagers best high street shop or best online deals currys pc consumer products computer deals world argos amazon internet deals for students john lewis hobbies and leisure products for teen years buying the best computer from dell acer samsung raycon best selling footwear fashion bargains for teenagers bose sony asus huawei HP microsoft OCR GCSE 9-1 Gateway Combined Science A Paper 4 Paper 10 Chemistry past exam papers 2018 2019 2020 2021 2022 Topics C4 Predicting & identifying reactions & products C5 Monitoring and controlling chemical reactions C6 Global challenges revision notes in-ear headphones earbuds downloadable games ipad desktop computer laptop computer for school college university students educational college university course opportunities for teenagers latest video games consoles apple iphone online download video games for teenagers google high end mobile phones cell phone bargain health products and advice for teenagers smartphone xiaomi computer laptops desktop pc deals for students oppo high tech products jewellery for teenage girls latest fashion in trainers personal care and beauty products for teenagers latest fashion in shoes best selling fashion clothes OCR GCSE 9-1 Gateway Combined Science A Paper 4 Paper 10 Chemistry past exam papers 2018 2019 2020 2021 2022 Topics C4 Predicting & identifying reactions & products C5 Monitoring and controlling chemical reactions C6 Global challenges revision notes clothing bargains for teenagers latest fashion in mobile phones cell phones Nintendo games consoles internet music film entertainment deals subscriptions advice on teenage health conditions, ASOS Marketplace, Levi's, Boohoo, Pretty Little Thing, Misguided, Dorothy Perkins, Debenhams, Boden, John Lewis, Marks and Spencer, Amazon, Oasis, Super Dry, Nasty Gal, G-Star Raw, Burton Snowboards, Ralph Lauren, Timberland, NA-KD, Monki, SamsaraWear, OCR GCSE 9-1 Gateway Combined Science A Paper 4 Paper 10 Chemistry past exam papers 2018 2019 2020 2021 2022 Topics C4 Predicting & identifying reactions & products C5 Monitoring and controlling chemical reactions C6 Global challenges revision notes Vans, Calluna, People Tree, Sister Organics, Thought, Tala, AEROPOSTALE – Best Cheap Teenage Clothing. ASOS – Best Designer Teenage Clothing, FOREVER 21 – Best Gender Inclusive Teenage Clothing, YESSTYLE – Best Cute Girls Clothing, JUSTICE – Best Clothing Store For Tweens, PACSUN – Best Trendy Teenage Clothing Store, Best Brand for Formal Dresses: Lulus, Best Workout Brand: Outdoor Voices, Best Purse Brand: JW Pei, Best Jewelry Brand: En Route Jewelry Most Sustainable Brand: Nuuly, OCR GCSE 9-1 Gateway Combined Science A Paper 4 Paper 10 Chemistry past exam papers 2018 2019 2020 2021 2022 Topics C4 Predicting & identifying reactions & products C5 Monitoring and controlling chemical reactions C6 Global challenges revision notes Best Shoe Brand: Dr. Martens, Best Size-Inclusive Option: Girlfriend Collective, H & M, Urban Outfitters, American Outfitters, Target, Lulus, Hollister, Victoria's Secret, Adidas, Forever 21, Nike sports products
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INDEX
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Topic
C4 "Predicting & identifying reactions & products"
QUIZ (OCR Gateway GCSE Combined Science)
