Question & Answer: Prekallikrein, a blood protein, has a molar mass of 85000 g/mol. A solution is made by…..

Prekallikrein, a blood protein, has a molar mass of 85000 g/mol. A solution is made by dissolving 570. mg of this protein in 10.0 mL water. Calculate the osmotic pressure of this solution at 37.0°C in mm Hg.
_________ mm Hg

Expert Answer

Answer

Moles of protein dissolved = Mass/MW = 0.570/85000 = 0.0000067

Molarity of solution, C = Moles/Volume = 0.0000067/0.010 = 0.00067 M

Osmotic pressure, P = C*R*T = 0.00067*8.314*(273+37) = 1.7268 Pa = 0.01295 mm Hg

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