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2% of aqueous urea and 6% of aqueous 'X'...

2% of aqueous urea and 6% of aqueous 'X' are isotonic. If 'X' is a molecular solid, calculate its molar mass.

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For isotonic solutions, osmotic pressures are same , `pi_1 = pi_2`.
Hence , concentrations of solutions are also same, `C_1 = C_2`
Since moles are equal , `(W_1)/(M_1) = (W_2)/(M_2)` (or) `2/60 = 6/(M_2)`
Molar mass of soltue `X =M_2 = 180 g mol^(-1)`.
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AAKASH SERIES-DILUTE SOLUTIONS-EXERCISE - 1.2
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  2. What are the factor on-which solubility depends on ?

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  3. Discuss on the vapour pressure of solutiosn of solids in liquids.

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  4. Aerated water bottles are kept under cold water during summer. Why ?

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  5. What is relative lowering of vapour pressure ?

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  6. Write the units of cryoscopic constant and ebullioscopic constant?

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  7. How is osmotic pressure useful in determining molar masses?

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  8. How is the principle of reverse osmosis? Used for desalination?

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  9. The molar concentration of proton obtained by mixing equal volumes of ...

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  11. A freash grape fruit dipped in brine solution shrinks. Why ?

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  12. Vapour pressure of beneze and toluene are 160 are 60 torr. What will b...

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  13. How water can be made boiling without heating?

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  14. Write the reason of abnormality in molar masses.

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  15. Relate the colligative properties with van't Hoff factor.

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  17. Calculate the normally of 10.6 % (w/v) Na2CO3 in aqueous solutions.

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  20. The density of 8.653% (w/v) Na2CO3 solution is 1.018 g mL^(-1). Calcul...

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