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YOGYAKARTA - Salt hydrolysis is a basic chemical concept that explains why salt solutions are not always neutral. Let's understand the salt ion reaction with water that determines the acidic or basic properties of the solution.

Indeed, for some people, the phenomenon of salt hydrolysis often makes them confused, even though the principle is simple. By understanding this process, you will be able to predict the properties of solutions of various types of salts.

Have you ever thought, "Why if we dissolve table salt (NaCl) in water, the water remains neutral, but if we dissolve baking soda powder (NaHCO3), the solution becomes basic?" The answer lies in one magical concept, Salt Hydrolysis!

As reported by VOI from the By Jus page, salt hydrolysis is a chemical reaction in which ions from salts interact with water (H2O), which ultimately determines whether the solution will be acidic, basic, or remain neutral.

English:

A salt is formed from an acid and a base. The secret of hydrolysis is that only ions derived from the weak component (Weak Acid or Weak Base) can react with water.

The reason is, because the ions from the strong component (Strong Acid or Strong Base) are stable ions, so they are not interested in reacting back with water. Here, let's take a look at four types of salts and their properties:

To understand it, see the example of Sodium Chloride (NaCl), which is formed from HCl (Strong Acid) and NaOH (Strong Base).

Read also the article discussing Arrhenius Acid-Base Theory: Definition and Formulas Used

For the second type, an example can be taken of Sodium Acetate (CH3COONa) which is formed from CH3COOH (Weak Acid) and NaOH (Strong Base).

To understand it, see the example of Ammonium Chloride (NH4Cl) which is formed from HCl (Strong Acid) and NH4OH (Weak Base).

Consider the example of Ammonium Acetate (CH3COONH4) formed from CH3COOH (Weak Acid) and NH4OH (Weak Base).

Salt hydrolysis is the bridge between the concepts of acids and bases and solutions. Without understanding it, we will not know why certain salts taste bitter (basic) or acidic.

Thus, knowledge of salt hydrolysis is key to understanding buffer solutions, titrations, and various real-life applications, such as maintaining pH stability in food or medicine.