Which of the following is NOT a characteristic of strong bases?

The characteristic of strong bases includes their ability to completely dissociate in aqueous solutions, producing hydroxide ions (OH⁻) that lead to a high pH. Strong bases are usually soluble in water and yield a high concentration of hydroxide ions when dissolved. Basicity in aqueous solutions is a defining trait, as the strength of a base is often determined by how effectively it increases the pH of a solution.

When considering pKa values, strong bases have very low pKa values, often negative, because they are strong proton acceptors and therefore have a tendency to deprotonate very easily. A high pKa value typically corresponds to weak acids, reflecting a weaker tendency to donate protons.

Thus, the statement regarding a high pKa value being a characteristic of strong bases is incorrect, as it contradicts the fundamental definition of base strength and behavior in solutions.