74 Решение задачки по химии №07 431

6. At a temperature T, the vapor pressure of a solution of concentration c of an unknown non-volatile substance in a liquid solvent is equal to R Pa; the density of this solution d.
The dependence of saturated vapor pressure on temperature over a liquid and solid pure solvent is given in the table:
1. calculate the molecular weight of the solute;
2. determine the molar and molar concentrations of the solution;
3. calculate the osmotic pressure of the solution;
4. build a curve P = f (T) for a given solution and solvent; Use the data from task 3 of the corresponding option characterizing the solvent.
5. determine graphically the temperature at which the vapor pressure over the pure solvent will be equal to R Pa;
6. determine graphically the increase in the boiling point at a pressure P of a solution of a given concentration,
7. calculate the ebullioscopic constant;
8. determine the drop in the freezing point of the solution;
9. Calculate the cryoscopic constant.

Option Mass fraction of non-volatile substance, % Molar mass of solvent P,Pa T,K d .10-3 kg/m3
6 9 34 55000 207 1.985

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