$ 7.6 \mathrm{gm} \mathrm{KBr} $ in $ 1250 \mathrm{ml} $ solution was found to have an osmotic pressure of $ 1.804 $ atm at $ 27^{\circ} \mathrm{C} $. Calculate degree of dissociation in $ \% $ (Atomic weight $ \mathrm{K}=39, \mathrm{Br}=80 $ )

Question

$ 7.6 \mathrm{gm} \mathrm{KBr} $ in $ 1250 \mathrm{ml} $ solution was found to have an osmotic pressure of $ 1.804 $ atm at $ 27^{\circ} \mathrm{C} $. Calculate degree of dissociation in $ \% $ (Atomic weight $ \mathrm{K}=39, \mathrm{Br}=80 $ ), $ 43.4 \% $, $ 58.4 \% $, 4. $ 64 \% $, $ 80 \% $

MARKS App · Accepted Answer

KBr ⇌ K + + Br - 1 0 0 1 - α α α ( 1 + α ) π=iCRT i = 1 . 804 CRT C = 7 . 6 119 / 1250 1000 = 1 . 804 × 119 × 1250 7 . 6 × 1000 × 0 . 0821 × 300 i = 1 . 434 i = 1 + α 1 ∴ α = i - 1 = 1 . 434 - 1 α = 0 . 434 , % = 43 . 4

Search any question & find its solution

Looking for more such questions to practice?