CBSE Class 12 · 2008 · Delhi; also All India 2010 Compartment · SolutionsShort Answer

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State Henry's law correlating the pressure of a gas and its solubility in a solvent and mention two applications of the law.

Solution

Henry's law: at a constant temperature, the solubility of a gas in a liquid is directly proportional to the pressure of the gas over the solution,

p = K_{H} x

Applications:
(i) Soft drinks and soda water are bottled under high pressure of CO

_{2}

to increase its solubility.
(ii) Deep-sea divers use helium–oxygen mixtures: helium's low solubility in blood avoids the painful 'bends' when the diver surfaces. (Also, the low partial pressure of O

_{2}

at high altitudes explains anoxia in climbers.)

CBSE Class 12 Board · 2008 · Delhi; also All India 2010 Compartment · Subjective

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