Chemistry Chemical Changes 0.0 / 5 ? ChemistryChemical ChangesGCSEAQA Created by: ZGrimwoodCreated on: 08-12-19 11:54 What is the pH scale? A measure of how acidic or alkaline a solution is 1 of 17 What does a neutral substance have a pH of? 7 2 of 17 Where are the acidic solutions in the pH scale? 0-6 3 of 17 Where are the alkaline solutions in the pH scale? 8-14 4 of 17 What is the reaction between acids and bases? Acid * base - salt * water 5 of 17 Whats the difference between Strong and Weak Acids? Strong acids ionise completely in water but weak acids do not fully ionise 6 of 17 What is the Reactivity Series? A list of metals in order of their reactivity towards other substances 7 of 17 How are the reactivity of metals determined? By how easily they lose electrons 8 of 17 What is Oxidation? Gain of Oxygen 9 of 17 What is Reduction? Loss of Oxygen 10 of 17 What is a Redoc Reaction? When electrons are transferred 11 of 17 A more reactive metal will displace a ... metal from its compound Less reactive 12 of 17 What is an example of a displacement reaction? iron * copper sulfate - iron sulfate * copper 13 of 17 What is Electrolosis? A reacton which is caused by an electrical current 14 of 17 What are Positive Ions attracted to? Cathode 15 of 17 What are Negative Ions attracted to? Anode 16 of 17 What do Half Equations show? The reactions at the electrode 17 of 17
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