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Acids and Bases

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State

An acid yields hydronium ions in water; a base yields hydroxide ions in water.

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Hydrogen chloride gas dissolved in water reacts with it to form H3O+; solid sodium hydroxide dissolves to release Na+ and OH− directly.

Watch for

Dissolved acids do not release a bare H+ ion into solution; that proton transfers immediately to a water molecule, forming H3O+.