Define the term osmotic pressure. describe how the molecular mass of a substance can be determined by a method based on measurement of osmotic pressure.
Answers
Solution:
The extra pressure which is required to stop the process of osmosis is regarded as the osmotic pressure.
Osmotic pressure is directly proportional to the molarity of the substance at a given temperature.
Different methods are used like Barkley and Hartley’s method in order to determine the molecular mass using osmotic pressure.
ANSWER- The extra pressure which is required to stop the process of osmosis is regarded as the osmotic pressure.
Osmotic pressure is directly proportional to the molarity of the substance at a given temperature.
Different methods are used like Barkley and Hartley’s method in order to determine the molecular mass using osmotic pressure.
Osmotic pressure symbol= π
π∝C [Molarity]
π∝T
∴π=STC where S= solution constant
∵ Molarity= moles/ (V) Volume in litres
moles= weight(W) / Molar mass(m)
∴π= W /m× 1/V ×S.T⟶ From this equation molar mass can be determined.