Question

Molal elevation constant `"K"_(b)` for water is `0.52K//m. 0.1` molal solution of NaCl will boil at
A. `100.52^(@)"c"`
B. `100.052^(@)"C"`
C. `101.04^(@)"C"`
D. `100.104^(@)"C"`

Answer 1

If vant Hoff factor is I, then
`Delta"T"_(b)=i"K"_(b).m("for NaCl i=2")`
`=2xx0.52.0.1=0.104`
And , so the boiling point of solution will be `100.104^(@)"C".`