Which of the listed salts undergo hydrolysis when dissolved in water: aluminum chloride, potassium sulfide

| August 23, 2021 | education

Which of the listed salts undergo hydrolysis when dissolved in water: aluminum chloride, potassium sulfide, sodium chloride. Write the equations corresponding to hydrolysis

Hydrolysis is understood as the reaction of interaction of a substance with water, as a result of which a new substance is formed, the solution environment changes.

NaCI is a salt formed by a strong base (sodium hydroxide) and a strong acid (hydrochloric acid), does not interact with water, the solution medium is neutral.

AlCI3 + H2O = Al (OH) 2CI + HCI (aluminum chloride is formed by a weak base – aluminum hydroxide, hydrolyzed by cation, acidic medium).

AlCI3 + 3H2O = Al (OH) 3 + 3HCI (complete hydrolysis on heating).

K2S + H2O = KHS + KOH (potassium sulfide is formed by a weak acid – hydrogen sulfide, hydrolyzed by anion, the medium is alkaline).



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