Question

A 0.004M solution of Na₂SO₄is isotonic with a 0.01M solution of glucose at same tem-perature. The apparent degree of dissociation of Na₂SO₄ is

• A. 25%
• B. 50%
• C. 75%
• D. 85%

Answer 1

Answer: (C)

75%

Answer 2

$\pi_{Na_{2}SO_{4}}$ = p_glucose

CRT (1 + 2a) = CRT

0.004 (1 + 2a) = 0.01

\ a = 0.75

or = 75%