✔ 最佳答案
oxidation: Fe2+ -------> Fe3+ + e- (Fe loses one electron to change from 2+ to 3+)
reduction: Ag+ + e- -------> Ag (Ag gains one electron to change from + to 0 neutral)
In real situation, oxidation and reduction could not exist by it own. One gives out electrons, somebody has to accept so oxidation and reduction exist together. These pair of reactions are called redox reaction. For example,
Fe2+ + Ag+ -------> Fe3+ + Ag
One electron is given up by Fe2+ to become Fe3+(oxidation), this electron is captured by Ag+ to become Ag (reduction).