JEE PYQ: Solutions And Colligative Properties Question 4
Question 4 - 2021 (17 Mar Shift 2)
A 1 molal $\text{K}_4[\text{Fe(CN)}_6]$ solution has a degree of dissociation of 0.4. Its boiling point is equal to that of another solution which contains 18.1 weight percent of a non-electrolytic solute A. The molar mass of A is ____ u.
Show Answer
Answer: 85
Solution
Effective molality $= 0.6 + 1.6 + 0.4 = 2.6$ m. For other solution: $2.6 = \frac{18.1/M}{81.9/1000}$. $M = 85$ u.
BETA
