Reactions and Elements 0.0 / 5 ? ChemistryReactions and ElementsASAQA Created by: Sophie PerrettCreated on: 20-03-15 10:20 What is oxidation? When electrons are lost 1 of 16 What is reduction? When electrons are gained 2 of 16 What does an oxidising agent do? Accepts electrons and gets reduced 3 of 16 What does a reducing agent do? Donates electrons and gets oxidised 4 of 16 What do redox reactions always involve? The movement of electrons 5 of 16 How can we see the transfer of electrons in an equation? By seperating a redox reaction into two half equations that show the loss and gain of electrons 6 of 16 In a half equation, do you write it with plus electrons or minus electrons? Plus 7 of 16 What is a spectator ion? An ion which takes no part in the reaction 8 of 16 What does OILRIG stand for? Oxidation Is Loss, Reduction Is Gain 9 of 16 What is the oxidation number for all the Group 1 elements? +1 10 of 16 What is the oxidation number for all the Group 2 elements? +2 11 of 16 What is the oxidation number for all the Group 7 elements? -1 12 of 16 What is the oxidation number of hydrogen? +1 13 of 16 What is the oxidation number of sulfur? -2 14 of 16 What is the oxidation number of all uncombined elements? 0 15 of 16 What do we need for a redox reaction to be balanced? The number of atoms of each element must be the same on each side and the total charge on each side must be the same 16 of 16
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