Write in molecular and ionic form the equations for the hydrolysis of the following salts: a) potassium sulfide; b) copper (II) sulfate; c) joint hydrolysis of aluminum chloride and potassium acetate. Salt hydrolysis constant
a) Hydrolysis of potassium sulfide:
K2S + H2O = KHS + KOH – (molecular form);
S2– + HOH = HS– + OH– – (ionic form).
b) Hydrolysis of copper sulfate (ⅠⅠ):
2CuSO4 + 2H2O = (CuOH) 2SO4 + H2SO4 – (molecular form);
Cu2 + + HOH = CuOH + + H + – (ionic form).
c) Joint hydrolysis of aluminum chloride and potassium acetate:
AlCl3 + 3CH3COOK + 3H2O = Al (OH) 3 ↓ + 3CH3COOH + 3KCl – (molecular form);
Al3 + + 3CH3COO– + 3HOH = Al (OH) 3 ↓ + 3CH3COOH – (ionic form).
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