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What are the applications of Dalton’s law of partial pressure?

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(i). Physicians report the pressure of the patient’s gases in blood, analyzed by hospital lab, the values are reported as partial pressures.

Gas – Normal range 

\(P_{CO_2}\)35 – 45mm of Hg 

\(P_{O_2}\)80 – 100 mm of Hg

(ii). When gas is collected by downward displacement of water, the pressure of dry vapour collected is computed using Dalton’s law

Pdry gas collected = PTotal - Pwater vapour

Pwater vapour = Aqueous tension

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