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प्रश्न
Vapour pressure of pure acetone and chloroform at 328 K are 741.8 mm Hg and 632.8 mm Hg respectively. Assuming that they form ideal solution over the entire range of composition, plot `p_"total"`, `p_"chloroform"` and `p_"acetone"` as a function of `chi_"acetone"`. The experimental data observed for different compositions of mixtures is:
| `bb(100 xx chi_"acetone")` | `bb(P_"acetone"//"mm Hg")` | `bb(p_"chloroform"//"mm Hg")` |
| 0 | 0 | 632.8 |
| 11.8 | 54.9 | 548.1 |
| 23.4 | 110.1 | 469.4 |
| 36 | 202.4 | 359.7 |
| 50.8 | 322.7 | 257.7 |
| 58.2 | 405.9 | 193.6 |
| 64.5 | 454.1 | 161.2 |
| 72.1 | 521.1 | 120.7 |
Plot this data also on the same graph paper. Indicate whether it has a positive or negative deviation from the ideal solution.
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उत्तर
| `bb(100 xx chi_"acetone")` | `bb(P_"acetone"//"mm Hg")` | `bb(p_"chloroform"//"mm Hg")` | `bb("P"_"total" ("mm Hg"))` |
| 0 | 0 | 632.8 | 632.8 |
| 11.8 | 54.9 | 548.1 | 603.0 |
| 23.4 | 110.1 | 469.4 | 579.5 |
| 36 | 202.4 | 359.7 | 562.1 |
| 50.8 | 322.7 | 257.7 | 580.4 |
| 58.2 | 405.9 | 193.6 | 595.5 |
| 64.5 | 454.1 | 161.2 | 615.3 |
| 72.1 | 521.1 | 120.7 | 641.8 |
It can be observed from the graph that the plot for the ptotal of the solution curves downward. Therefore, the solution shows a negative deviation from the ideal behaviour.
संबंधित प्रश्न
How is the sign of ΔmixH related to positive deviations from Raoult’s law?
Define an ideal solution and write one of its characteristics.
What type of intermolecular attractive interaction exists in the pair of methanol and acetone?
Fill in the blanks by choosing the appropriate word/words from those given in the brackets:
Ideal solutions obey ………. law and they …………. form azeotropic mixtures.
(Henry’s, aldol condensation, absence, do not, ohm, Raoult’s, increases, common ion effect, easily, three, solubility product, ohm-1, two, four, ohm-1, cm2, Cannizzaro, ohm-1 cm-1, zero, decreases, presence)
The partial pressure of nitrogen in air is 0.76 atm and its Henry’s law constant is 7.6 × 104 atm at 300 K. What is the mole fraction of nitrogen gas in the solution obtained when air is bubbled through water at 300 K?
State Raoult law and obtain the expression for lowering of vapour pressure when the nonvolatile solute is dissolved Insolvent.
Which solution has the lower freezing point? 10 g of methanol (CH3OH) in 100g g of water (or) 20 g of ethanol (C2H5OH) in 200 g of water.
The observed depression in the freezing point of water for a particular solution is 0.093°C calculate the concentration of the solution in molality. Given that molal depression constant for water is 1.86 K Kg mol-1.
For ideal solution the enthalpy of mixing of the pure components to form the solution is ____________.
For ideal solution the volume of mixing of the pure components to form the solution is ____________.
Which of the following is an example of a solid solution?
What is “semi permeable membrane”?
Dissociation constant and molar conductance of an acetic acid solution are 1.78 × 10–5 mol L–1 and 48.15 S cm–2 mol–1 respectively. The conductivity of the solution is (considering molar conductance at infinite dilution is 390.5 S cm–2 mol–1)
How many times more hydrogen ions in a solution with a pH of 3 than in a solution with a pH of 6
The pH of a solution of hydrochloric acid is 1.5. Calculate the concentration of the acid.
If liquids A and B form an ideal solution, the ______.
Assertion (A): The enthalpy of mixing Δmix H is equal to zero for an ideal solution.
Reason (R): For an ideal solution the interaction between solute and solvent molecules is stronger than the interactions between solute-solute or solvent-solvent molecules.
