Conversation so far:
Which type of salts do not undergo hydrolysis
The salt of strong acid and strong base like NaCl, does not undergo hydrolysis.
Which type of salt undergos hydrolysis
Ammonium ion formed undergoes hydrolysis to form ammonium hydroxide and H^+ ions.
Is the ammonium hydroxide a possitive compound
The ammonium cation is a positively charged polyatomic ion with the chemical formula NH+4. It is formed by the protonation of ammonia -NH3-.

Question: When is the ion generated
Self-contained rewrite: When is the ammonium ion generated