Chapter 13, Problem 94TE

Chemical equations must be balanced not only in terms of the number of atoms but also by the charge. In other words, just as there should be same number of atoms before and after the arrow of an equation, there should be the same charge. Take this into account to balance the following chemical equation:

${\text{Sn}}^{2+}+\text{Ag}\to \text{Sn}+{\text{Ag}}^{+}$