Which element is undergoing reduction in the following reaction: Zn(s) + 2 AgNO3(aq) → Zn(NO3)2(aq) + 2 Ag(s)?
The silver ion,
The silver species formally undergoes a decrease in oxidation state from
In other words, reduction is gain of electrons, whereas oxidation is loss of electrons.....(LEO says GER, loss of electrons = oxidation;
gain in electrons = reduction). You will have to remember this.