Unit flashcards
Unit 6: Chemical Reactions — one card for every lesson
Unit 6 overview: Chemical Reactions
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Unit 6 overview — CO-ORDINATED SCIENCES: Chemical Reactions — 2 topics and 8 lessons. Work through the lessons in order, then use each lesson's Key terms and Common mistakes tabs to revise.TopicLessons6.1 Chemical Change and Rate of Reaction6.1.1 Physical and…
Open the lessonPhysical and Chemical Changes
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6.1.1 Physical and Chemical Changes — CO-ORDINATED SCIENCES notes: Distinguish physical changes from chemical changes and recognise the signs of a chemical reaction.Physical changePhysical change a change in which no new substance is formed.Physical changes are often easy to reverse…
Open the lessonRates of Reaction Factors
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Describe methods for measuring the rate of a reaction.1Rate = amount of reactant used or product formed ÷ time taken.2Units of rate include cm3/s or g/s.3The gradient of a product–time graph gives the rate; it is steepest at the start…
Open the lessonCollision Theory
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6.1.3 Collision Theory — CO-ORDINATED SCIENCES notes: Use collision theory and activation energy to explain how concentration, pressure, temperature, surface area and catalysts change the rate of a reaction.hydrogen chlorine collision energyconcentration collision frequencyParticles must collideParticles must collide Reactions can…
Open the lessonExplaining Rates Using Collision Theory
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6.1.4 Explaining Rates Using Collision Theory — CO-ORDINATED SCIENCES notes: Use collision theory to explain how concentration, pressure, surface area, temperature and catalysts change the rate of a chemical reaction (HT only).Reaction needs collisionsReaction needs collisions Particles can only react…
Open the lessonInvestigating the Rate of a Reaction
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6.1.5 Investigating the Rate of a Reaction — CO-ORDINATED SCIENCES notes: Describe practical methods for measuring the rate of a reaction, and plan fair investigations into concentration, surface area, temperature and a catalyst.gas syringe rate experimentWhat can be measuredWhat can…
Open the lessonInterpreting Data
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6.1.6 Interpreting Data — CO-ORDINATED SCIENCES notes: Read and sketch rate graphs, explain their shape, and calculate a rate of reaction from the gradient of a tangent.zero order rate concentrationreaction rate definitioncyclopropane concentration rate data1Start of the reactionStart of the…
Open the lessonOxidation and Reduction
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6.2.1 Oxidation and Reduction — CO-ORDINATED SCIENCES notes: Define oxidation and reduction in terms of oxygen, hydrogen and electrons, identify them in equations, and name oxidising and reducing agents.DefinitionOxidationReductionOxygenGain of oxygenLoss of oxygenHydrogenLoss of hydrogenGain of hydrogenElectronsLoss of electronsGain of…
Open the lessonRedox and Electron Transfer
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6.2.2 Redox and Electron Transfer — CO-ORDINATED SCIENCES notes: Define oxidation and reduction in terms of electron transfer, write half equations, identify the species oxidised and reduced, and use spectator ions to simplify ionic equations (HT only).OxidationOxidation Oxidation is the…
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