Discussion on the Ionic Reaction of Acetic Acid and Barium Hydroxide
Now there is a reaction between acetic acid and barium hydroxide, and the equation of the net ionic reaction is to be investigated. Acetic acid, which is a weak acid, is partially ionized in aqueous solution; barium hydroxide is a strong base and completely ionized.

When the two meet, the hydrogen ion of acetic acid combines with the hydroxide ion of barium hydroxide to form water. The chemical equation is:\ (2CH_ {3} COOH + Ba (OH) _ {2} = Ba (CH_ {3} COO) _ {2} + 2H_ {2} O\).

When writing the ionic equation, acetic acid should write its molecular formula, due to partial ionization; barium hydroxide is split into barium ion and hydroxide ion, barium acetate is soluble salt, split into barium ion and acetate ion, water is written its molecular formula.

Its ionic equation is:\ (2CH_ {3} COOH + Ba ^ {2 + } + 2 O H ^{-} = Ba ^ {2 + } + 2CH_ {3} COO ^{-} + 2H_ {2} O\).

Removing the same barium ions before and after the reaction, the net ion reaction equation can be obtained:\ (CH_ {3} COOH + OH ^{-} = CH_ {3} COO ^{-} + H_ {2} O\). This formula clearly shows the essence of the reaction between acetic acid and barium hydroxide, that is, the hydrogen ion of acetic acid is combined with hydroxide ion to form water, while barium ion does not participate in the substantial change before and after the reaction.