JasmineFreeman4920 JasmineFreeman4920

15-01-2020
Chemistry

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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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gbustamantegarcia054 gbustamantegarcia054

16-01-2020

Answer:

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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