Question

For 1 molal aqueous solution of the following compounds, which one will show the
highest freezing point?
(1) (Co(1,0), ]C1
(2) [Co(H20), Çi]C1, H20
(3) [Co(H20), C12]C1.2H,0"
(4) [Co(H20), Cl,].311,0​

Answer 1

Answer:

ΔT

F

=ixm×KF

m=1 (given)

ΔT

F

=i×K

f

for ionic compounds vant Hoff factors is equal to the number of discrete ions in a formula unit of the substance.

In First option 1 number of ions =2

In second option 2 Number of ions =1

In third option 3 Number if ions =4

In forth option 4 Number if ions =3

So, value if i will be lowest in option 2 [Co(H

2

O)

3

Cl

3

].3H

2

O