what do redox reactions have to do with electrons transferred.?
Reduction is defined as gain of electrons, and Oxidation is defined as loss of electronsYou can remember this as OIL RIG (Oxidation Is Loss: Reduction Is Gain) so long as you remember that OIL RIG refers to electronsThe value in this approach is that not every oxidation reaction involves oxygen, although many doConsider, for example, the Thermit reaction, which you may have seen demonstratedIron oxide + aluminium - iron + aluminium oxide Using the simple idea of reduction being loss of oxygen, and oxidation gain of oxygen you can see that this is a redox reaction and that iron oxide is getting reduced and aluminium being oxidisedI want to show that this is due to the electron transfersThe aluminium atoms are being turned into aluminium ions in aluminium oxide: Al - Al3+ which means the Al is losing 3 electrons from its outer shell, so for this reason the aluminium atom is being oxidised to an aluminium ionThe iron ions in iron oxide are becoming iron atoms: Fe3+ - Fe so these ions are gaining three electrons, hence being reducedWe can apply this to reactions such as Zn + S - ZnS Where the Zn is being oxidised and the sulphur reducedWe can also apply it to electrolysis reactions, where the anode is removing electrons from the negative ions, and hence oxidation is happening here and the cathode is adding electrons to the positive ions, and so reduction is happening hereElectrolysis reactions are redox tooHope that helps.
do you know what a panini is? do you think that when you get a toasted sub at subway, its a panini? how would an oven/pan give you a panini
