133477
Descrição
FlashCards por sjii.serjin, atualizado more than 1 year ago
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Criado por sjii.serjin
mais de 11 anos atrás
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| Questão | Responda |
| Oxidation State is an indicator of the degree of oxidation of an atom in a chemical compound | Rule 1: Elements in the elemental state have an oxidation state of zero e.g. Ag=0. Cu=0 |
| Rule 1: A molecule containing only one element has an oxidation state of zero E.g. H2=0, O2=0 | Rule 2: For monatomic ions, the oxidation state equals the charge on the ion e.g. Mg(2+)=+2, NH4(+)=+1 |
| Rule 3: For polyatomic species the sum of the oxidation states of all the atoms equals the charge on the ion or molecule e.g. NH3=0, NH4(+)=+1 | Rule 4: Oxygen is almost always -2 in compounds |
| Rule 5: Fluorine is always -1 | Rule 6: Hydrogen is almost always +1 |
| Oxidation leads to an increase in oxidation state, while reduction leads to a decrease in oxidation state | Oxidants are species which undergo reduction. Conversely, a species which undergoes oxidation itself is known as a reductant. Reactive metals are strong oxidants, whereas cations of unreactive metals such as potassium are strong reductants |
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