Decimolar solution of potassium ferricyanide, K3[Fe(CN)6], has osmotic pressure 3.94 atm at 27°C. Hence percent ionisation of the solute is -
Given:
M = 0.1 M (decimolar solution)
π = 3.94 atm
T = 27°C = 300 K
Using osmotic pressure equation:
π = iMRT
3.94 = i × 0.1 × 0.0821 × 300
3.94 = i × 2.463
i = 3.94 / 2.463 ≈ 1.6
For K₃[Fe(CN)₆]:
K₃[Fe(CN)₆] → 3K⁺ + [Fe(CN)₆]³⁻
Total ions (n) = 4
Relation:
i = 1 + (n − 1)α
1.6 = 1 + (4 − 1)α
1.6 = 1 + 3α
3α = 0.6
α = 0.2
% ionisation = α × 100
= 0.2 × 100
= 20%
Answer: (B) 20%
Van't Hoff factors of aqueous solutions of X, Y, Z are 1.8, 0.8 and 2.5. Hence t
NextAn aqueous solution of urea containing 18 g urea in 1500 cm³ of solution has a d
The osmotic pressure of urea solution is 3 atm and that of sugar solution is 8 atm. Osmotic pressure
MediumTwo solutions A and B are separated by a semipermeable membrane. As a result of osmosis, the level o
EasyThe solution having same osmotic pressure at constant (given) temperature are called-
MediumThe osmotic pressure of a dilute solution is given by-
MediumBlood cells retain their normal shapes in solutions which are-
EasyThe osmotic pressure of a solution is given by the relation-
Practice Chemistry Exams
Full-length mock tests with detailed analytics, rank, and percentile.
Browse Exams