77. What is osmosis? Osmotic pressure? What role does the osmotic pressure of cell sap play in regulating the flow of water into and out of the cell? Which solutions are called isotonic, hypertonic, hypotonic? For the solutions below, calculate the osmotic pressure and the average molecular weight of dissolved substances for biological objects. The solvent in all cases is water, its cryoscopic constant is 1.86 deg g/mol. Why is the calculated value of osmotic pressure in protein solutions lower than the measured one?

77. Isotonic with 0.025M glucose solution 40% solution.

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