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27 May, 07:32

what is the pressure of oxygen gas that is collected over water at 25 degrees celcius at an atmostpheric pressure of 800 mmKg?

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  1. 27 May, 09:27
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    PO2 = 776.2 mmHg

    Explanation:

    When it comes to gases collected on water, Dalton's law is of the utmost importance:

    Pgas = Patm - P*H2O

    ∴ P*H2O: vapor pressure

    ⇒ P*H2O (25°C) = 23.8 mmHg

    ∴ Patm = 800 mmHg

    ⇒ PO2 = 800 mmHg - 23.8 mmHg

    ⇒ PO2 = 776.2 mmHg
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