A study of acid and base chemistry is fundamental to organic chemistry. Weak acids are defined as solutes that partially ionize in a reaction with water molecules. The curved arrow formalism and the concept of electron donation from an electron rich atom to an electron poor atom can be applied to many reactions other than acid-base reactions. The identification of electron-rich and electron-poor components of molecules and an understanding of the electron flow can be used to predict products in a variety of reactions. Strong acids ionize in water to a greater extent when compared to a weak acid. The relative strength of two bases can be measured by changing the focus to their reaction with a common acid. Electronegativity plays an important role in acid-base reactions.