Question

Which element is undergoing reduction in the following reaction: Zn(s) + 2 AgNO3(aq) → Zn(NO3)2(aq) + 2 Ag(s)?

Answer 1

The silver ion, `Ag^+`, is reduced to silver metal, `Ag^0(s)`.

Explanation:

The silver species formally undergoes a decrease in oxidation state from `+I` to `0`. For every reduction, there is a corresponding oxidation, and zinc metal is oxidized to `Zn^(2+)`.

`Zn(s)uarr + 2AgNO_3(aq) rarr Zn(NO_3)_2(aq) + 2Ag(s)darr`

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.