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प्रश्न
Read the passage given below and answer the questions that follow.
| When two solutions are separated by a semi-permeable membrane, the solvent molecules move from a solution of lower molar concentration to a solution of higher molar concentration through osmosis. |
- Samar removed the outer hard shell of two different eggs while cooking at home. He then placed one egg in pure water and the other egg in a saturated solution of sucrose. What change is he likely to observe in the eggs after a few hours?
- Which solution, hypertonic or hypotonic, has a higher amount of solute in same quantity of solution?
- A 5% aqueous solution of glucose (molar mass = 180 g mol-1) is isotonic with 1.66 % aqueous solution of urea. Calculate the molar mass of urea.
उत्तर
- The low concentration of solvent (water) in the egg allows it to swell after a few hours, whereas the low concentration of solvent (water) in the solution causes the other egg, which is placed in a saturated solution of sucrose, to shrink.
- A hypertonic solution has a higher amount of solute in the same quantity of solution.
-
For isotonic solution, π1 = π2
`π_"Glucose" = "C"_1"RT"`
`π_"Uurea" = "C"_2"RT"`
For isotonic solution,
`π_"Glucose" = π_"turea"`
C1RT = C2RT
C1 = C2
`therefore ("W"_1)/("M"_1) = ("W"_2)/("M"_2)`
`therefore (5 × 1000)/(180 × 100) = (1.66 × 1000)/("M" × 100)`
M = 59.76 g mol-1
Thus, the molar mass of urea will be 59.76 g mol-1.
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संबंधित प्रश्न
The Arrhenius equation is_________________ .
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(b)`A=ke^(-E_a/(RT))`
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(d)`k=Ae^(-E_a/(RT))`
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