Acid–base reaction facts for kids
The reaction can be simplified to
The other ions remain constant because they are not affected by the reaction. They are called spectator ions.
Originally, acids and bases were defined only by properties, such as the fact that acids tasted sour and turned certain plant dyes from one color to another, while bases tasted bitter, changed the colors of the same plant dyes in the opposite direction, and neutralized the activity of acids.
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Antoine Lavoisier's laboratory
Acid–base reaction Facts for Kids. Kiddle Encyclopedia.