Day1-Rates_of_reaction.ppt for O level C
- 1. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words OBJECTIVE Describe the rate of reaction in terms of collision theory
- 2. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words OUTCOMES • Recognise that chemical reactions can happen at different speeds. • Understand that a chemical reaction involves collisions between particles • Describe the factors that affect a chemical reaction. 11.30- 11.55 till slide 17
- 3. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words Activation Energy • Reactions only happen if the particles have enough energy. • The minimum amount of energy needed to start a reaction is called the Activation Energy • The amount of activation energy needed is different for each reaction. • Every reaction has activation energy, they all need a little push to get started.
- 4. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words More than the activation energy. C O O C O O Effective collisions, a reaction. Molecules in right orientation
- 5. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words Collision theory • A chemical reaction involves a collision between particles. • The particles collide and make new substances • The particles which react are called the reactants • The substances which are made are called the products • Rate of reaction increases as the frequency of effective collision increases Activity How Fast? What affects the Speed? Task(Q & A) Discussion HW
- 6. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words Effective collision-rightly oriented
- 7. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words What happened?????? • I reacted hydrogen and oxygen together. - things that react are called reactants. • When the hydrogen and oxygen reacted together they made water – things that are made in a reaction are called products. reactants → products 11.30- 11.55 till slide 17
- 8. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words Speed of the reaction • Wow – the reaction happened very quickly! – do all reactions happen that fast? • Some reactions happen very quickly – a lot of energy is released quickly and it causes an explosion. Some reactions happen very slowly and can take days or weeks to happen! 11.30- 11.55 till slide 17
- 9. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words How fast? • These chemical reactions happen in your home – put them in order of how fast they happen fastest first. Gloss paint drying Fruit going rotten Gas burning on hob A cake baking A bath rusting 11.30- 11.55 till slide 17
- 10. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words Speed of the reaction How quickly a reaction happens is called THE RATE OF REACTION http://www.youtube.com/watch?v=kjKyEdrVXJA 11.30- 11.55 till slide 17
- 11. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words Question 1 The Rate of Reaction is? a)How fast reactants are changed into products b)The amount of kinetic energy a particle has c)How fast products are changed into reactants d)The number of reactions that happen per minute 11.30- 11.55 till slide 17
- 12. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words Question 2 Which of these reactions is the fastest? a)A firework exploding b)Frying an egg c)Iron on a car rusting d)Mr Berry digesting his lunch 11.30- 11.55 till slide 17
- 13. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words Question 3 Which of these reactions is the slowest? a)Wood rotting b)Magnesium being burnt c)Zinc reacting with hydrochloric acid d)Sodium reacting with water 11.30- 11.55 till slide 17
- 14. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words Question 4 Which theory explains reaction rates? a)Evolutionary theory b)Collision theory c)Newton’s first law d)None of the above 11.30- 11.55 till slide 17
- 15. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words FACTORS AFFECTING THE RATE OF REACTION • There are five factors that we can change to make the reaction go faster. They are • Concentration • Temperature • Surface area • Using a catalyst • Effect of light 11.30- 11.55 till slide 17
- 16. Concentration • Reactions in solution involve dissolved paticles that must collide before reaction is possible. • The more crowded (concentrated) the solution, the faster the reaction. Collisions infrequent Collisions frequent
- 18. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words Learning outcomes EXPLAIN how a variable affect the rate of reaction • Concentration – No of particles per unit volume. As concentration increases, effective collision increases & hence rate of reaction increases. 11.30- 11.55 till slide 17
- 19. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words EXPLAIN how a variable affect the rate of reaction • Temperature As temperature increases, kinetic energy of particles increases that results in increase of effective collisions & hence rate of reaction increases Day 2_ task1_main activity_rates_of_reactions.ppt
- 20. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words What makes a reaction go faster? • Increasing the temperature. • Increasing the concentration of reactants. Explain the factors with the help of collision theory? 11.55- 12.10 till slide 22
- 21. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words Q & A • Explain why vegetables last longer in a fridge (2 marks) 11.55- 12.10 till slide 22
- 22. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words Q & A • Explain why vegetables last longer in a fridge (2 marks) Lower the temperature lower the rate of reaction. 11.55- 12.10 till slide 22
- 23. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words HW Questions Aditional study material Exercise in the worksheet Rate of Reaction Q no.1,3 & 4 11.55- 12.10 till slide 22
- 24. The effect of concentration on rate
- 25. Anagrams
- 26. Rates of reaction: summary faster higher faster Higher
- 27. Watch the video and discuss in the class http://www.youtube.com/watch? v=kjKyEdrVXJA https://www.youtube.com/watch? v=NYcGmfelpdo
- 28. 27/04/25 Measuring the Rate of ReactionThree common methods: Time/s Mass or reactants/g OR volume of gas formed/cm3 Table of results: 1 2 3
- 29. 27/04/25 Rate of reaction graph Rate of reaction graph Amount of product formed/ amount of reactant used up Time/s Slower reaction Fast rate of reaction here Slower rate of reaction here due to reactants being used up Rate of reaction = amount of product formed/reactant used up (in g/s or cm3 /s) time
- 30. L.O. Evaluate the experimental methods Success Criteria 1. Suggest possible improvements. 2. Interpret and evaluate experimental observations and data 3. Record experimental observations and data.
- 31. Q 1.
- 32. Q2
- 33. Q3
- 34. Q4 .
- 35. Q5 .
- 36. Answers 1. A 2. A 3. D 4. A 5. B
- 37. In a group solve and discuss the AO3 skills question • Solve the worksheet 2
- 38. Review/Reflect
- 39. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words PLENARY 10.00- 10.18 Across 3. Reaction rates can be explain by this theory 6. An example of a slow reaction is the ____________ of iron. 8. Increasing this increases the amount of particles in a solution which speeds up the reaction. Down 1. The amount of energy needed for a reaction to happen is called the _____________ energy. 2. This speeds up a reaction but is not used up in the reaction 4. Breaking up a large lump into smaller lumps increases the ____________ area 5. This is a biological catalyst 7. Increasing this makes particles move faster with greater energy
- 40. Lesson Order Objectives Chemical reactions How fast? What affects the speed? Task outcomes Apr 27, 2025 Catalyst, concentration, energy, particles, products, rate of reaction, reactants, surface area, temperature Key words What level will you reach?... To get a grade D: you will be able to define rate of reaction. To get a grade C: you should give examples of slow and fast reactions. To get a grade B: you should be able to identify the factors affecting rate of reaction. To get a grade A/A*: you should be able to explain how different factors affect the rate of reaction.
Editor's Notes
- #17: Teacher notes This simulation illustrates how increasing the temperature increases the number of collisions between particles.
- #24: Teacher notes This animation can be used to introduce the reaction between magnesium and hydrochloric acid as a way of measuring the effect of concentration on rate of reaction. It could be shown as precursor to running the experiment in the lab, or as a revision exercise.
- #26: Teacher notes This completing sentences activity provides the opportunity for some informal assessment of students’ understanding of rates of reaction.