Question

Which is more covalent $\mathrm{AgCl}\mathrm{or}\mathrm{KCl}$?

Answer 1

1. Covalent bonds are formed by the mutual sharing of electrons.
2. Covalent characters are related to the polarizing power of an atom.
3. The ability of cation to pervert the anion is called polarizing power.
4. The tendency of anion to become polarized by the action of cation is called polarizability.
5. If the size of the cation is smaller, then the charge density will be much higher.
6. Thus, this suggests that the polarizing power of cation is inversely proportional to its size and so the covalent characteristics of cation is proportional to polarizing power of cation.
7. This implies that if the size of the cation is larger then it is less covalent in nature.
8. ${\mathrm{Ag}}^{+}$is much bigger than ${\mathrm{K}}^{+}$, therefore $\mathrm{AgCl}$is less covalent than$\mathrm{KCl}$.