1. Tardigrade
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  3. Chemistry
  4. 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)

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Q. The observed osmotic pressure for a 0.10 M solution of $Fe(NH_4)_2(SO_4)_2$ 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)

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Solution:

$\pi= CRTi$

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

$i =4.42 $ (observed)