alleryOsmotic pressure of 0.01 M sucrose solution at 27°C (R = 0.0821 L atm/mol K):
A1 atm
B0.246 atm (= 0.01 × 0.0821 × 300)
C2.46 atm
D0.0821 atm
Answer & Solution
Correct answer: B. 0.246 atm (= 0.01 × 0.0821 × 300)
π = MRT = 0.01 × 0.0821 × 300 = 0.246 atm.
(Even dilute solutions can have substantial osmotic pressures, hence important for cells: isotonic saline ≈ 0.9% NaCl.)
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