AQA A Level Chemistry Redox
| Front | Rule 4 of assigning oxidation states |
| Back | for an element existing as an ion, the oxidation state is the charge on the ionfor compound ions, the sum of the oxidation states is the same as the charge on the ion |
| Front | rule 3 of assigning oxidation states |
| Back | all the oxidation states of each atom must sum to 0 in a compound |
| Front | rule 2: oxidation states and their exceptions |
| Back | Group 1: +1 oxidation state Group 2: +2 oxidation state Group 3: +3 oxidation state Hydrogen: +1 oxidation state. exception = METAL HIDRIDES e.g LiHFlourine: -1 oxidation state. Oxygen: -2 oxidation state. exception = in peroxides e.g H2O2, Na2O2 Chlorine (other halides): -1 oxidation state. exception = chlorates, bromates e.g NaClO |