1. Tardigrade
  2. Question
  3. Chemistry
  4. Lead storage battery contains 38 % by weight solution of H 2 SO 4. The van't Hoff factor is 2.67 at this concentration. The temperature in Kelvin at which the solution in the battery will freeze is (Nearest integer). Given K f=1.8 K kg mol -1

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Lead storage battery contains $38 \%$ by weight solution of $H _2 SO _4$. The van't Hoff factor is $2.67$ at this concentration. The temperature in Kelvin at which the solution in the battery will freeze is ______(Nearest integer).
Given $K _f=1.8\, K \,kg\, mol ^{-1}$

JEE MainJEE Main 2023Solutions

Solution:

$ \Delta T _{ f }= i . K _{ f } \cdot m $
$ \Rightarrow \Delta T _{ f }=2.67 \times 1.8 \times \frac{38}{98} \times \frac{1000}{62} $
$ \Rightarrow \Delta T _{ f }=30.05 $
$ \therefore F . P .=243\, K$