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AQA GCSE Chemistry Topic 4 - Chemical Changes

 




  Below is everything the examiners think you know, if you're not sure of something click on the link to watch my YouTube video explanation. For a copy of these you can print off, get the FREE revision guide I wrote for you.


 • I can describe the reaction between metal and oxygen 

 • I can recall the order of the reactivity series 

 • I can describe when a displacement reaction might take place 

 • I can use experimental data to work out the order of reactivity 

 • I can describe how unreactive metals are found in the Earth 

 • I can describe reduction 

 • I can describe the process of extracting aluminium by electrolysis 

 • I can describe oxidation as the loss of electrons  Higher tier only 

 • I can describe reduction as a gain of electrons Higher tier only 

 • I can write balanced ionic half equations  Higher tier only 

 • I can determine which element in a reaction is oxidised or reduced from the equation  Higher tier only 

 • I can use the general equation to give the products from a reaction video 1video 2video 3

 • I can determine the formula of a salt from common ions 

 • I can describe how to make a pure salt video 1video 2 

 • I can describe the ions that lead to acidic and alkaline conditions 

 • I can use the pH scale to describe how acidic or alkaline a solution is 

 • I can use an equation to show neutralisation 

 • I can carry out a titration video 1video 2video 3video 4

 • I can calculate a concentration from titration data  Chemistry only 

 • I can give examples of strong and weak acids  Higher tier only 

 • I can describe how concentration relates to pH  Higher tier only 

 • I can use the terms strong, weak, concentrated and dilute in term of acids  Higher tier only 

 • I can explain why compounds need to be molten or dissolved to conduct 

 • I can describe the movement of ions during electrolysis 

 • I can predict the products of electrolysis Video 1Video 2Video 3Video 4

 • I can write balanced half equations to describe what happens at each electrode 

 • I can describe how to test for the production of chlorine gas 

 • I can describe how to test for the production of hydrogen gas 

 • I can describe how to test for the production of oxygen gas 

 • I can describe what happens to aqueous solutions that are electrolysed