Define a weak acid or base. Calculate pH and pOH of a weak acid or base solution making use of simple formula, quadratic equation, and also including autoionization of water. Calculate the pH or pOH conveniently.


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Weak acids and bases are only partly ionized in their solutions, whereas strong acids and also bases are completely ionized as soon as dissolved in water. Some common weak acids and bases are provided here. In addition, weak acids and also bases are extremely prevalent, and we enrespond to them often both in the scholastic problems and also in day-to-day life. The ionization of weak acids and bases is a nlinux.orgical equilibrium phenomenon. The equilibrium principles are crucial for the knowledge of equilibria of weak acids and also weak bases. In this connection, you most likely realize that conjugate acids of weak bases are weak acids and also conjugate bases of weak acids are weak bases.

Typical Weak AcidsUsual Weak Bases
Acid Formula Base Formula
Formic (ceHCOOH) ammonia (ceNH3 )
Acetic (ceCH3COOH) trimethyl ammonia (ceN(CH3)3 )
Trichloroacetic (ceCCl3COOH ) pyridine (ceC5H5N )
Hydrofluoric (ceHF ) ammonium hydroxide (ceNH4OH )
Hydrocyanic (ceHCN ) water (ceH2O )
Hydrogen sulfide (ceH2S ) (ceHS-) ion (ceHS-)
Water (ceH2O ) conjugate bases of weak acids e.g.: (ceHCOO-)
Conjugate acids of weak bases (ceNH4+ )

Ionization of Weak Acids

Acetic acid, (ceCH3COOH), is a typical weak acid, and also it is the ingredient of vinegar. It is partially ionized in its solution.

The framework of the acetate ion, (ceCH3COO-), is shown listed below.

Circle With Two Lines Through It Symbol S, Parallel Lines In Circle Symbol