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Mr King – Chemistry Paper 2 Revision Question and Answer Sheets

Things to do Test yourself regularly Ask somebody at home to test you Make flashcards of the questions and answers Use these on Quizlet – Search “King’s Chem Revision” You’ll have a weekly quiz on these questions Remember, you can also use Seneca to keep revising. Mr King – Chemistry

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Mr King – Chemistry Paper 2 Revision Question and Answer Sheets

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  1. Things to do • Test yourself regularly • Ask somebody at home to test you • Make flashcards of the questions and answers • Use these on Quizlet – Search “King’s Chem Revision” • You’ll have a weekly quiz on these questions • Remember, you can also use Seneca to keep revising Mr King – Chemistry Paper 2 Revision Question and Answer Sheets

  2. Rate of Reaction Faster Reaction = steeper Slower Reaction Chemistry Revision Sheets - Topic 11 – Rate of Reaction Catalyst

  3. Fractional Distillation Cold Chemistry Revision Sheets - Topic 12 – Organic Chemistry 1 Crude Oil In Hot

  4. Alkanes Alkenes • Double bond • Unsaturated • More Reactive Methane CH4 Ethane C2H6 Ethene C2H4 Chemistry Revision Sheets - Topic 13 – Organic Chemistry 2 Propane C3H8 Propene C3H6 Butane C4H10 Butene C4H8 General Formula CnH2n+2 General Formula CnH2n

  5. Changing Conditions – An Example N2 + 3H2  2NH3(exothermic forwards) If you increase the pressure… the forward reaction will increase, giving a higher yield of NH3. This is because there are fewer molecules on the right, reducing the pressure. Chemistry Revision Sheets - Topic 14 – Equilibria If you increase the temperature… the backward reaction will increase, giving a lower yield of NH3. This is because the backward reaction is endothermic, and it will reduce the temperature. If you remove some of the products…the forward reaction will increase, until equilibrium is reached again. A Reaction To Learn… hydrated copper sulfate (blue) anhydrous copper sulfate (white) ⇌ + water Endothermic forwards, exothermic backwards

  6. Chromatography • Solvent Front • Movement of Compounds • Paper Chemistry Revision Sheets - Topic 15 – Chemical Analysis and Formulations • Samples • Pencil Line • Solvent Rf Calculation • Step 1) Measure distance travelled by spot and substance. • Step 2) Use the formula; the answer should be less than 1

  7. History of the Earth’s Atmosphere Formation of the Earth 4.6 billion years ago Volcanoes erupted, releasing gases For 1 billion years… Early atmosphere formed - Carbon dioxide (large amount), methane and ammonia (small amounts), no oxygen. Chemistry Revision Sheets - Topic 16 – The Atmosphere Algae first produced oxygen, with photosynthesis 2.7 billion years ago Plants evolved, photosynthesised, oxygen level increased. Carbon dioxide levels dropped. Over the next billion years… For the last 200 million years… Earth’s modern atmosphere 80% Nitrogen 20% Oxygen <1% Carbon Dioxide, Water Vapour, Noble Gases

  8. Topic 18 – Using Resources Topic 17 – Greenhouse Gases Chemistry Revision Sheets

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