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(a) Acetone boils at 56.38^@C and a solu...

(a) Acetone boils at `56.38^@C` and a solution of 1.41g of an organic compound in 20 g of acetone boils at `56.88^@C`. Calculate the molar mass of the organic compound (Given `K_(b)` for acetone `=1.67 K kg//mol`).
(b) What is reverse Osmosis?Mention one important application of it.

Text Solution

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(a) `AT_(b) = K_(b) xx` molality
`AT_(b) = K_(b) xx (molality //( M solute)) xx 1000` / m solvent
`(56.88 - 56.38) = 1.67 xx (l .41 // M solute) xx 100%`
M solute = 235.47
(b) It is the process of movement of solvent molecules from higher concentration to low concentration by applying pressure greater than osmotic pressure.
Application : It is used in desalination of sea water.
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