A qualitative measure of the strength of a base. The larger the value, the stronger the base.

Answer 1

One common qualitative measure of the strength of a base is the pKa value. The pKa value represents the negative logarithm of the acid dissociation constant for the conjugate acid of the base. The larger the pKa value, the weaker the acid, and hence the stronger the base. Therefore, a larger pKa value indicates a stronger base.