Question
Question: pH of 0.1(M) BOH (weak base) is found to be 12. The solution at temperature T K will display an osmo...
pH of 0.1(M) BOH (weak base) is found to be 12. The solution at temperature T K will display an osmotic pressure equal to
A
0.01 RT
B
0.01(RT)2
C
0.11 RT
D
1.1 RT
Answer
0.11 RT
Explanation
Solution
pH = 12, pOH = 14 – 12 = 2, [OH–] = 10–2
= 0.1 a
or a = 0.1
i = 1 + (n – 1)a = 1 + (2 – 1) × 0.1 = 1.1
p = iCRT = 1.1 × 0.1 RT = 0.11 RT