Answer : The molality of NaCl is, 1.95 mol/kg
Explanation :
Formula used for Elevation in boiling point :
where,
= change in boiling point =
= boiling point constant for water =
m = molality
i = Van't Hoff factor = 2 (for electrolyte)
The dissociation will be,
So, Van't Hoff factor = Number of solute particles = = 1 + 1 = 2
Now put all the given values in the above formula, we get:
Therefore, the molality of NaCl is, 1.95 mol/kg