CIE IGCSE Chemistry Topic 7 REVISION (Chemical reactions)

This is an engaging revision lesson which uses a range of exam questions, understanding checks, quick tasks and quiz competitions to enable students to assess their understanding of the content within topic 7 (Chemical reactions) of the CIE IGCSE Chemistry (0620) specification. The lesson covers the content in both the core and supplement sections of the specification and therefore can be used with students who will be taking the extended papers as well as the core papers.

The specification points that are covered in this revision lesson include:

CORE

• Describe and explain the effect of concentration, particle size, catalysts (including enzymes) and temperature on the rate of reactions
• Interpret data obtained from experiments concerned with rate of reaction
• Understand that some chemical reactions can be reversed by changing the reaction conditions
• Define oxidation and reduction in terms of oxygen loss/gain.

SUPPLEMENT

• Devise and evaluate a suitable method for investigating the effect of a given variable on the rate of a reaction
• Describe and explain the effects of temperature and concentration in terms of collisions between reacting particles. (An increase in temperature causes an increase in collision rate and more of the colliding molecules have sufficient energy (activation energy) to react whereas an increase in concentration only causes an increase in collision rate.)
• Predict the effect of changing the conditions (concentration, temperature and pressure) on other reversible reactions
• Demonstrate knowledge and understanding of the concept of equilibrium
• Define redox in terms of electron transfer
• Define oxidising agent as a substance which oxidises another substance during a redox reaction. Define reducing agent as a substance which reduces another substance during a redox reaction.
• Identify oxidising agents and reducing agents from simple equations

The students will thoroughly enjoy the range of activities, which include quiz competitions such as “FROM NUMBERS 2 LETTERS” where they have to compete to be the 1st to get an important abbreviation whilst crucially being able to recognise the areas of this topic which need their further attention. This lesson can be used as revision resource at the end of the topic or in the lead up to mocks or the actual GCSE exams