PKa

PKa stands for the “Polarity of Acid”. This measure tells us how strong an acid is. Generally, stronger acids (with high PKa numbers) break apart more easily into smaller pieces when they interact with other substances. This makes them able to react with (or 'bond to') other substances more easily. On the other hand, weaker acids (with lower PKa numbers) don't break apart as easily and have a hard time bonding to other substances. Think of it like a puzzle. Pieces of a jigsaw puzzle with high PKa numbers represent strong acids that easily fit together with pieces of other puzzles (or other acids). Pieces of a jigsaw puzzle with low PKa numbers represent weak acids that have trouble fitting together.