Q.

Colligative properties depend on the number of solute particles present in the solution. Osmotic pressure of 90% ionized 0.1M  BaCl2 solution at 270c is

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a

5.4 atm

b

4.9 atm

c

6.9 atm

d

7.4 atm

answer is C.

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Detailed Solution

BaCl2 ⇌Ba+2+2Cl-; n=3 i=1-α+nα;  i=1+2α; i=1+1.8=2.8(given α=0.9); π=iCRT; π=2.8×0.1×0.0821×300=6.89 atm
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Colligative properties depend on the number of solute particles present in the solution. Osmotic pressure of 90% ionized 0.1M  BaCl2 solution at 270c is