Protein sodium salt solution and sodium chloride solution are separated by a semi-permeable membrane. If the concentration of sodium protein salt in the membrane is much higher than that of sodium chloride outside the membrane, the distribution of sodium chloride will be-the answer is that almost all sodium chloride remains outside the membrane:

The concentration inside the semi-permeable membrane is much higher than that outside, which means that the osmotic pressure inside the membrane is higher than that outside the membrane. ................................................................................................................................................