The observed osmotic pressure for a 0.10 M solution of Fe(NH4)2(SO4)2 at 25°C is 10.8 atm. The expected and experimental (observed) values of Van't Hoff factor (i) will be respectively: (R = 0.082 L atm k- mol-1)

Question

The observed osmotic pressure for a 0.10 M solution of Fe(NH4)2(SO4)2 at 25°C is 10.8 atm. The expected and experimental (observed) values of Van't Hoff factor (i) will be respectively: (R = 0.082 L atm k- mol-1) (A) 5 and 4.42 (B) 4 and 4.00 (C) 5 and 3.42 (D) 3 and 5.42

Tardigrade Admin · Accepted Answer

π= CRTi i =(π/ CRT )=(10.8/0.1 × 0.0821 × 298) i =4.42 (observed)

Q. The observed osmotic pressure for a 0.10 M solution of $F e (N H_{4})_{2} (S O_{4})_{2}$ at 25 $^{\circ}$ C is 10.8 atm. The expected and experimental (observed) values of Van't Hoff factor (i) will be respectively :
(R = 0.082 L atm k^- mol^-1)

5 and 4.42

4 and 4.00

5 and 3.42

3 and 5.42

$π = CRT i$

$i = \frac{π}{CRT} = \frac{10.8}{0.1 \times 0.0821 \times 298}$

$i = 4.42$ (observed)

Q. The observed osmotic pressure for a 0.10 M solution of Fe(NH4​)2​(SO4​)2​ at 25∘C is 10.8 atm. The expected and experimental (observed) values of Van't Hoff factor (i) will be respectively : (R = 0.082 L atm k- mol-1)