1.

If sodium sulphate is considered to be completely dissociated into cations and anions in aqueous solution, the chagne in freezing point of water (Delta T_(f)), when 0.01 mol of sodium sulphate is dissolved in 1 kg of water, is (K_(f) =1.86 kg mol^(-1))

Answer»

0.0186 K
0.0372 K
0.0558 K
0.0744 K

Solution :Given
`Na_(2)SO_(4)(alpha = 100%)`
i=3
`k_(F)=1.86`
`W//m=0.01`
W = 1 kg = 1000 G
`Delta T_(f)=(1000xx k_(f)xx i xx w)rArr Delta T_(f)=(1000xx1.86xx3xx0.01)/(1000)`
`Delta T_(f)=5.58xx0.01=0.0558 K`


Discussion

No Comment Found

Related InterviewSolutions