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Q.
Osmotic pressure of insulin solution at 298 K is found to be 0.0072 atm. Hence height of water column due to this osmotic pressure is (density of Hg = 13.6 g cm$^{-3}$)
Solutions
Solution:
Pressure = $hdg$
P = $hdg $ (for Hg)
1 atm = 76 mm of Hg
$\therefore 0.0072 atm \equiv 0.0072 \times $760 mm of Hg
P = 0.0072 $\times$ 760 $\times $ 13.6 $\times$ 9.8 (for Hg)
P = $h \times 1 \times 9.8$ (for water)
(density of water = 1 g/cm$^3$)
$\therefore \, 9.8 \times h = 0.0072 \times 60 \times 13.6 \times 9.8$
$h = 0.0072 \times 760 \times 13.6 $ mm
= 74.42 mm