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Dry air was passed through a solution co...

Dry air was passed through a solution containing `20g` of a substance in 100-0g of water and then through pure water. The loss in mass of the solution was `2.945g` and that of pure water was `0.059g`. Calculate the molar mass of the substance.

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To calculate the molar mass of the substance, we can use the concept of relative lowering of vapor pressure. Here are the steps to solve the problem: ### Step 1: Understand the given data - Mass of the solute (substance) = 20 g - Mass of water (solvent) = 100 g - Loss in mass of the solution (Δm_solution) = 2.945 g - Loss in mass of pure water (Δm_water) = 0.059 g ...
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Lowering in vapour pressure is determined by Ostwald and Walker dynamic methed. It is based on the prinicipal , that when air is allowed to pass through a solvent or solution, it takes up solventvapour with it to get itself saturated at that temperature I and II are weighted separately before and after passing dry air. Loss in mass of each set, gives the lowing of vapour pressure. The temperature of air, the solution and the solvent is kept constant. Dry air was passed thorough 9.24 g of solute in 108 g of water and then through pure water. The loss in mass of solution was 3.2 g and that of pure water 0.08 g . The molecular mass (g/mol) of solute is nearly :

RC MUKHERJEE-DILUTE SOLUTION AND COLLIGATIVE PROPERTIES-Objective problems
  1. Dry air was passed through a solution containing 20g of a substance in...

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  2. A molal solution is one that contains one mole of a solute in

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  3. Vapour pressure of a solvent is 17.5 mmHg while that of itsdilute solu...

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  4. Which of the following is not a colligative property ?

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  5. When an ideal binary solution is in equilibrium with its vapour, molar...

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  6. The osmotic pressure of a solution is given by the relation

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  7. The osmotic pressure of solution at 0^(@)C is 4 atm what will be its o...

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  8. Which of the following aqueous solution shas osmotic presseure nearest...

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  9. 0.1 M solution of urea, at a given temperature, is isotonic with

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  10. Which one of the following pairs of solution can we expect to be isoto...

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  11. Which statement is incorrect about osmotic pressure(pi), volume (V), a...

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  12. Equal volumes of 0.1 M urea and 0.1 M glucose are mixed. The mixture w...

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  13. The factor (DeltaT(f)//K(f)) represents

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  14. The f.p. of 1% solution of Ca(NO(3))(2) in water will be

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  15. Which has the highest freezing point at 1 atm ?

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  16. Which of the following 0.1M aqueous solution will have the lowest f.p....

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  17. An aqueous solution contains 5% and 10% of urea and glucose respective...

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  18. When 1 mole of a solute is dissolved in 1 kg of H(2)O , boiling point ...

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  19. An aqueous solution of NaCl shall boil at

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  20. Which solution will have the highest b.p. ?

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  21. Which solution will have the highest boiling point ?

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