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Above are links to the main sections of Doc Brown's Chemistry's website, these in turn link to other sub-indexes from which I hope you will bookmark useful and relevant links for your science course. At the top and bottom of all revision notes pages of Doc Brown's Chemistry are more detailed sets of navigation bar buttons to which you should make yourself familiar. The Google search engine is dedicated to Doc Brown's Chemistry's website putting in 'anything of interest' and you can put in multiple words to get the best page match from Doc Brown's website.

"Doc Brown's Chemistry" is a website designed for UK science students studying GCSE Biology, GCSE/IGCSE Chemistry, GCSE Physics and Advanced Level Chemistry. My website covers the current science syllabus specifications from AQA, Edexcel and OCR examination boards. This science revision e-learning  website includes notes & quizzes for chemistry, but includes some biology and physics too AND lots of 'unofficial' revision summaries for ALL the current GCSE Sciences (links below). The new GCSE specifications starting in September 2016 will be eventually covered completely by Doc Brown's Chemistry plus biology and physics revision notes and specification summaries.

CV and 1993 still with beardCV and 2006 still click click!!I hope these web pages of 'Doc Brown's Chemistry'  help your studies! and a warm welcome to the HOMEPAGE of doc b's "Chemistry Online" revision website. This was my millennium 'teaching & learning' project and Doc Brown (teacher) has been online since 2000! Its a big SCIENCE WEBSITE to get to know from a retired CHEMISTRY teacher (and some physics and general science for teaching and learning purposes), SO, use the appropriate INDEXES and Google custom 'Doc Brown's Site' SEARCH too! 'Doc Brown's Chemistry' (all material Dr Phil Brown 2000-2016) has lots of  science revision notes & quizzes, mainly an e-learning website for chemistry, but includes some biology and physics too AND lots of 'unofficial' revision summaries for ALL the current English GCSE Science courses

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New & re-edited webpages: 'Doc Brown's Chemistry' and 'docspics' Dec 23rd Wallington Hall ion exchange resins separations by filtration evaporation decantation crystallisation evaporation Dec 26th a level organic chemistry Dec 27th A level chemistry notes A level inorganic chemistry A level physical theoretical chemistry Dec 28th gcse chemistry notes extraction of copper enthalpy changes electron configurations ionic bonding copper chemistry Dec 29th distillation making insoluble salts by precipitation reactivity of metals observations molarity calculations Dec 30th hard & soft water electrolysis NaCl electrolysis of CuSO4 relative atomic mass cracking reaction mechanism diamond & graphite Jan 1st uses of oil fractions transition metals metal extraction atomic structure calculations % yield molar gas volume calculations electrolysis calculations water of crystallisation calculations periodic table states of matter energy changes uses electrolysis of water transition metal iron A level chemistry questions gcse chemistry questions chromium chemistry manganese chemistry Jan 4th oxidation states gcse biology gcse chemistry gcse physics gcse additional science gcse science gcse separate sciences reactivity series of metals rusting and prevention metal reactivity experiments alkali metals Jan 5th cobalt chemistry nickel chemistry Jan 6th extraction of metals Jan 7th 1. Everyday examples of acids, alkalis & hazard warning signs 2. pH scale, indicator colours, ionic theory of acids, alkalis (bases) & neutralisation 4. Acid reactions with metals/oxides/hydroxides/carbonates, neutralisation reactions 5. Reactions of bases-alkalis like sodium hydroxide 6. (i) Methods of making salts index and chemical tests for ions in salts & tests for common gases 7. Changes in pH in a neutralisation reaction, choice and use of indicators 8. Important formulae, salt solubility and water of crystallisation 10. More on acid-base theory and weak and strong acids and their properties abs03 abs09 Jan 9th isom1 isom2 rates3a rates3d Jan 10th use of ion exchange resins nanotubes fullerenes buckminsterfullerene naming aldehydes & ketones A level volumetric calculations organic mechanisms nucleophilic substitution in haloalkanes Jan 11th periodic table history for A level students enthalpy calculations photosynthesis naming organic nitrogen compounds Jan 12th video games alkali metals rates surface area  rates catalyst  halogens  graphene  calorimeter experiments Jan 13th  1. INTRODUCTION to electrolysis - electrolytes, non-electrolytes, electrode equations, apparatus 2. Electrolysis of acidified water (dilute sulfuric acid) and some sulfate salts and alkalis 3. Electrolysis of sodium chloride solution (brine) and bromides and iodides 4. Electrolysis of copper(II) sulfate solution and electroplating with other metals e.g. silver 5. Electrolysis of molten lead(II) bromide (and other molten ionic compounds like zinc chloride) 6. Electrolysis of copper(II) chloride solution 7. Electrolysis of hydrochloric acid 8. Summary of electrode equations and products 9. Summary of electrolysis products from various electrolytes 10. Simple cells (batteries) 11. Fuel Cells e.g. the hydrogen - oxygen fuel cell  18. Electrolysis calculations - quantities of products - atom economy  Heat changes in chemical/physical changes - exothermic and endothermic 2. Reversible reactions and energy changes 3. Activation energy and reaction profiles 4. Catalysts and activation energy 5. Introduction to bond energy/enthalpy calculations 6. Calorimeter methods of determining energy changes and EXAMPLES of experiments you can do 7. Energy transfer calculations from calorimeter results Jan 14th What do we mean by the rate/speed of reaction?  Why is it important to know how fast reactions occur?  How can we measure the speed or rate of a chemical reaction?  Experimental methods are described in this introduction & subsequent sections 2. Collision theory of chemical reaction rate factors 3a Effect on rate of changing reactant concentration in a solution/gas mixture 3b Effect on rate of changing pressure in reacting gases 3c Effect on rate of changing particle size/surface area * & stirring of a solid reactant 3d Effect on rate of changing the temperature of reactants 3e Effect on rate of using a catalyst in a chemical reaction 3f Light initiated reactions - effect of changing intensity 4. Examples of graphs of rate data, interpretation Jan 15th A Reversible Reactions B Reversible reactions and Equilibrium C The Haber Synthesis of ammonia - nitrogen fixation D(a) The manufacture and uses of ammonia-nitric acid-fertilisers (and preparation of ammonium salts) D(b) NPK fertilisers-environmental problems E The nitrogen cycle Jan 17th FOSSIL FUELS, coal, oil & natural gas and the Carbon Cycle 2.  Fractional distillation of crude OIL & uses of fractions, a good fuel? 3. ALKANES - saturated hydrocarbons, combustion, reaction with chlorine 4. POLLUTION, carbon monoxide, sulfur/nitrogen oxides, acid rain 4A Air pollution, incomplete combustion, carbon monoxide & soot 4B Pollution, Accidents and Economic Aspects of the Petrochemical Industry 4C Greenhouse effect, global warming, climate change, carbon footprint from fossil fuel burning 4D Air pollution, sulfur oxides, nitrogen oxides, acid rain 5. ALKENES - unsaturated hydrocarbons - reaction with bromine & hydrogen 6. CRACKING - a problem of supply and demand, other products 7. POLYMERS, plastics, poly(ethene), poly(propene), uses, problems, recycling   8. Why so many series of organic compounds? - homologous series 9a. Alcohols, Ethanol, manufacture, physical properties and chemical reactions AND 9b. Biofuels & alternative fuels, hydrogen, biogas, biodiesel 10a. Carboxylic acids - chemistry and uses AND 10b. Esters, chemistry and uses including perfumes 11. Condensation polymers, Nylon, Terylene, comparing thermoplastics, fibres, thermosets 12. Natural molecules - carbohydrates - sugars - starch, DNA 3. Amino acids, proteins, polypeptides, enzymes & chromatography 14. Natural vegetable oils, fats, margarine, emulsions and soaps 15. Vitamins, drugs, medicines, E numbers, food additives, cooking chemistry! 16. Ozone depletion, CFC's and free radicals O3 Jan 19th chemistry definitions formulations separating mixtures chromatography SEPARATING FUNNEL, MAGNET, CENTRIFUGE, SOLVENT EXTRACTION

IN FUTURE THIS WILL BE MY MAIN GCSE SCIENCE EXAM REVISION SUMMARY INDEX for biology, chemistry, physics and science GCSE courses - The 'old' navigation system for GCSE science courses catered for on Doc Brown's Chemistry was far too complicated (big apology in retrospect). Things will be a lot simpler from July 2017 onwards when the 'old' GCSE courses have finished and the 'old' GCSE science summary pages dealt with by deletion or conversion to stand alone notes!


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