Osmotic pressure is widely used to determine molar masses of proteins and polymers. Two…
Chemistry · Class 12 · CBSE — Solutions
Osmotic pressure is widely used to determine molar masses of proteins and polymers. Two solutions having same osmotic pressure are called isotonic solutions. Water can flow in or out from a substance depending on if it is kept in hypotonic or hypertonic solutions. The direction of the osmosis can be reversed if a pressure larger than osmotic pressure is applied on solution side.
Osmotic pressure is generally preferred for determining the molecular masses of protein because
- it is difficult to find out mole fraction of proteins for calculations by other methods
- at elevated temperature the proteins are likely to decompose and osmotic pressure is measured around room temperature
- the apparatus involved in finding out osmotic pressure is simpler than other methods
- it is easy to boil or freeze a solution containing proteins.
Answer
(B) at elevated temperature the proteins are likely to decompose and osmotic pressure is measured around room temperature
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