Redox 5.0 / 5 based on 2 ratings ? ChemistryRedoxA2/A-levelAQA Created by: champion1607Created on: 26-05-18 13:02 What three things define oxidation? Loss of electrons, gain of oxygen and loss of hydrogen 1 of 13 What three things define reduction? Gain of electrons, loss of oxygen and gain of hydrogen 2 of 13 What acronym helps us to remember redox rules? OILRIG 3 of 13 What is an oxidation state? Tells you the total number of electrons it has donated or accepted 4 of 13 Uncombined elements have what oxidation state 0 5 of 13 What is the oxidation state of a simple monatomic ion? Same as its charge i.e Na+ = 1 6 of 13 What is the oxidation state of a compound ion? Equal to the ion charge i.e SO4 2- = 2- 7 of 13 Combined oxygen is always what oxidation state ? -2 8 of 13 When is oxygen not -2? When it is in a peroxide = -1 9 of 13 Combined hydrogen has what oxidation state? +1 10 of 13 When is hydrogen not +1? In metal hydrides where it is -1 11 of 13 What is an oxidising agent ? A chemical that accepts electrons and gets reduced 12 of 13 What is a reducing agent? A chemical that donates electrons and gets oxidised 13 of 13
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