An aqueous solution of volume 300 contains 0.63 g of protein. The osmotic pressure of the solution at 300 K is 1.29 mbar. The molar mass of the protein is ________ g . Given: R = 0.083 L bar [2023]

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Solution

Q.
An aqueous solution of volume 300 ${cm}^{3}$ contains 0.63 g of protein. The osmotic pressure of the solution at 300 K is 1.29 mbar. The molar mass of the protein is ________ g ${mol}^{- 1}$ . Given: R = 0.083 L bar $K^{- 1}$ ${mol}^{- 1}$ [2023]

Ans.
(40535)

$π = \frac{W / M}{V} R T$

or $M = \frac{W \times R \times T}{π \times V}$ $= \frac{0.63 \times 0.083 \times 300}{1.29 \times 10^{- 3} \times 300 \times 10^{- 3}}$

or $M = 40535 g/mol$

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