5194632
Description
Flashcards by Bee Brittain, updated more than 1 year ago
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Created by Bee Brittain
over 9 years ago
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| Question | Answer |
| Oxidation Number - Definition | Can be thought of as the number of electrons involved in bonding to a different element. Can be used to check when balancing equations |
| Oxidation Number - Rules (3) | - Always 0 for elements - Each atom in a compound has an oxidation number - An oxidation number has a sign which is places before the number |
| Oxidation number of Oxygen, O | -2 |
| Oxidation number of Hydrogen, H | +1 |
| Oxidation number of Fluorine, F | -1 |
| Oxidation number for ions: Mg 2+ and Ca 2+ | +2 |
| Oxidation number for ions: Br- , Cl - and I- | -1 |
| Oxidation number for H in metal Hydrides | -1 |
| Oxidation number for O in peroxides | -1 |
| Oxidation number for when O is bonded to F | +2 |
| Oxidation | Oxidation is losing electrons and an increase in oxidation number |
| Reduction | Reduction is gaining electrons and a decrease in oxidation number |
| Redox Reactions | Involve reduction AND oxidation. If a substance is oxidised another substance must be reduced |
| Disproportionation Reaction | Where a substance is reduced whilst simultaneously being oxidised |
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