200cm3 of an aqueous solution of a protein contains 1 26 gm of a protein The osmotic pressure of - Chemistry - Solutions

Question

200cm3 of an aqueous solution of a protein contains 1 26
gm of a protein The osmotic pressure of such a solution at 300K is
found to be 2 57 * 10-3 bar Calculate the molar mass of
the protein

Vartika Jain · Accepted Answer

Dear User,
According to Van't Hoff equation,
π=cRT   = nVRT   = wBRTMBVMB = wBRTπVV = 200 cm3=0
20 L, wB = 1
26 g , T= 300 K, R= 0
083 LbarK-1mol-1 , π=2
57×10-3 barTherefore, MB = 1 26×0
083×3002 57×10-3×0
20                          = 61039 gmol-1

200cm3 of an aqueous solution of a protein contains 1.26 gm of a protein. The osmotic pressure of such a solution at 300K is found to be 2.57 * 10-3 bar. Calculate the molar mass of the protein.

200cm³ of an aqueous solution of a protein contains 1.26 gm of a protein. The osmotic pressure of such a solution at 300K is found to be 2.57 * 10^-3 bar. Calculate the molar mass of the protein.