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

Step-by-step solution

The depression in freezing point of the solution can be written as follows, ΔT f = i · K f · m molality (m) = w / w % Molar   mass   of   solute × 1000 mass   of   solvent   in   grams ⇒ ΔT f = 2 . 67 × 1 . 8 × 38 98 × 1000 62 ⇒ ΔT f = 30 . 05 ∴ Freezing point of solution at which battery freeze = 243   K