Exercise 3 | Colligative Properties of Solutions

What is the van’t Hoff i-factor of the following salts dissolved in water:

Pb(NO3)2 (s), silver nitrate, magnesium chloride, sulfurous acid?

Pb(NO3)2 (s) + H2O (l) → Pb2+ (aq) + 2 NO3- (aq)

⇒ i = 3

 

silver nitrate = AgNO3

AgNO3 (s) + H2O (l) → Ag+ (aq) + NO3- (aq) 

⇒i = 2

 

magnesium chloride = MgCl2

MgCl2 (s) + H2O (l) → Mg2+ (aq) + 2 Cl- (aq)

⇒ i = 3

 

sulfurous acid = H2SO3

H2SO3 (aq) → 2 H+ (aq) + SO32-

⇒ i = 3