Ionic dissociation of the following salts is not complete in reality:
Calculate the boiling temperatures of aqueous solutions of
a) Magnesium chloride $(\mu=0.50;\; i=2.70)$
b) Iron(III) chloride $(\mu=0.50;\; i=3.40)$
with:
$i$ Van t'Hoff´s factor (see discussion of $i$ → here)
a) $s$ = magnesium chloride $MgCl_2$
Each mole gives by dissociation 3 moles of ions!
$\Delta T$ $=$ $K_{eb}\cdot i\cdot \mu_s$
$\Delta T$ $=$ $0.512\cdot 2.70\cdot 0.50$ $=$ $0.69^oC$
$t_{eb}=100+0.69=100.69^oC$
a) $s$ = iron(III)chloride $FeCl_3$
Each mole gives by dissociation 4 moles of ions!
$\Delta T$ $=$ $K_{eb}\cdot i\cdot \mu_s$
$\Delta T$ $=$ $0.512\cdot 3.40\cdot 0.50$ $=$ $0.87^oC$
$t_{eb}=100+0.87=100.87^oC$
