The principle of salt hydrolysis is that the salt completely dissociates in water, and its anion or cation reacts with water to form hydroxide ions or hydron ions, which affect the pH of the solution.
A salt formed from a strong acid and a weak base will add an acidic solution when added to water. The reason for this is that when the salt dissociates, the weak base conjugate acid will donate a proton or one hydrogen ion to water and form hydronium.
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