Mg_(3) N_(2) when reacted with water gives off ammonia but HCl is not obtained when MgCl_(2) reacts with water at room temperature . Explain .

Mg_(3) N_(2) when reacted with water gives off ammonia but HCl is not

1.	Mg_(3) N_(2) when reacted with water gives off ammonia but HCl is not obtained when MgCl_(2) reacts with water at room temperature . Explain .
Answer» Solution :`Mg_(3)N_(2)` is a SALT of a strong BASE `Mg(OH)_(2)` and a weak acid `NH_(3)` . Therefore , it undergoes hydrolysis to give `NH_(3)` . `Mg_(3) N_(2) + 6H_(2) O to 3 Mg(OH)_(2) + 2NH_(3)` In contrast , `MgCl_(2)` is a salt of a strong base `Mg(OH)_(2)` and a strong acid HCl . Therefore , it does not undergo hydrolysis to give HCl . `MgCl_(2) + 2 H_(2)O cancelto Mg (OH)_(2) + 2 HCl`