Hydrolysis is the reaction of the exchange decomposition of a substance with water, as a result of which a weak electrolyte is formed and the solution environment changes.
Sodium nitrate dissociates as follows NaNO3 = Na (+) + NO3 (-)
The salt formed by a strong acid (nitric) and a strong base (sodium hydroxide) does not react with water and does not change the pH of the solution, i.e. remains neutral.
Strontium sulfide (Sr2S) dissociates:
Sr2S = 2Sr (+) + S (2-) This salt is formed by a weak acid (hydrogen sulfide) and a strong base (strontium hydroxide). It hydrolyzes by anion, has an alkaline solution (pH greater than 7).
S (2-) + H2O = HS (-) + OH (-) First stage
HS (-) + H2O = H2S + OH (-) second stage
Note: the charges of the ions are indicated in parentheses.
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