Question

Of the following`0.10m` aqueous solutions,which one will exhibits the largest freezing point depression?
A. `K_(2)SO_(4)`
B. `Nal_(2)(SO_(4))_(3)`
C. `C_(6)H_(12)O_(6)`
D. `KCl`

Answer 1

Correct Answer - B
`DeltaT=ik_(f)xxm`
`K_(2)SO_(4)rarr2K^(+)+SO_(4)^(2-)DeltaT=3xxk_(f)xx0.1=0.3xxk_(f)`
`KClrarrK^(+)+Cl^(-)DeltaT=2xxk_(f)xx0.1=0.2xxk_(f)`
`C_(6)H_(12)O_(6)DeltaT=1xxk_(f)xx0.1=0.1xxk_(f)`
`Al_(2)(SO_(4))_(3)rarr2Al^(3+)+3SO_(4)^(2-)DeltaT=5xxk_(f)xx0.1=0.5xxk_(f)`