Write the molecular and ionic equations for the hydrolysis of salts: NaNO3, NiSO4, K2CO3.

| March 2, 2021 | education

Write the molecular and ionic equations for the hydrolysis of salts: NaNO3, NiSO4, K2CO3. Indicate the nature (pH) of the medium in each solution.

Hydrolysis is a chemical reaction of a substance interacting with water, as a result of which weak electrolytes are formed. Only those salts can enter into hydrolysis that are formed by: a strong base and a weak acid; weak base and strong acid; weak base and weak acid.

NaNO3 does not undergo hydrolysis, since the salt is formed by a strong base (NaOH) and a strong acid (HNO3). Wednesday is neutral.

NiSO4 is hydrolyzed at the cation (Ni (OH) 2 is a weak base and H2SO4 is a strong acid). The environment is acidic (the environment is created by a strong cation / anion of the compound, so to speak):

Ni + 2 + HOH = NiOH- + H +

NiOH- + HOH = Ni (OH) 2 + H +

K2CO3 is hydrolyzed at the weak anion. Alkaline medium:

CO3-2 + HOH = HCO3- + H +

HCO3- + HOH = H2CO3 + H +



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