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Edexcel GCSE Chemistry Topic 3 - 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 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 recall the pH scale is logarithmic

 • I can determine the pH change when two substances are added together

 • I can recall the colour changes when adding acid or alkali to either litmus, methyl orange or phenolphthalein

 • 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 use the general equation to give the products from a reaction Video 1 Video 2  Video 3 

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

 • I can recall the test for hydrogen

 • I can recall the test for carbon dioxide

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

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

 • I can recall and apply the rules for solubility

 • I can describe how to make a pure dry insoluble salt 

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

 • I can describe the movement of ions during electrolysis  Video 1  Video 2  video 3  Video 4 Video 5  Video 6

 • I can predict the products of electrolysis

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

 • 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