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4. Dalton's Law of Partial Pressure Collecting Gases Over Water Partial Pressure Gases > Partial Pressure Free to share, print, make copies and changes. Get yours at www.boundless.com www.boundless.com/chemistry

5. The total pressure of a mixture of gases can be defined as the sum of the pressures of each individual gas: [Equation 1]. Dalton's Law of Partial Pressure Gases > Partial Pressure Free to share, print, make copies and changes. Get yours at www.boundless.com www.boundless.com/chemistry/textbooks/alternative-to-chemistry-the-central-science-8th-theodore-l-brown-h-eugene-lemay-bruce-e-bursten- 0130103101-9780130103109/gases-10/partial-pressure-80/dalton-s-law-of-partial-pressure-352-7267 Equation 1 View on Boundless.com Dalton View on Boundless.com

6. The partial pressure of an individual gas is equal to the total pressure multiplied by the mole fraction of that gas. Boyle's Law and the Ideal Gas Law tell us the total pressure of a mixture depends solely on the number of moles of gas, and not the kinds of molecules; Dalton's Law allows us to calculate the total pressure in a system from each gas' individual contribution. Dalton's Law of Partial Pressure Free to share, print, make copies and changes. Get yours at www.boundless.com www.boundless.com/chemistry/textbooks/alternative-to-chemistry-the-central-science-8th-theodore-l-brown-h-eugene-lemay-bruce-e-bursten- 0130103101-9780130103109/gases-10/partial-pressure-80/dalton-s-law-of-partial-pressure-352-7267 Dalton View on Boundless.com Gases > Partial Pressure

7. The total pressure in an inverted tube can be determined by the height of the water displaced in the tube. When calculating the amount of gas collected, Dalton's Law must be used to account for the presence of water vapor in the collecting bottle. Collecting Gases Over Water Free to share, print, make copies and changes. Get yours at www.boundless.com www.boundless.com/chemistry/textbooks/alternative-to-chemistry-the-central-science-8th-theodore-l-brown-h-eugene-lemay-bruce-e-bursten- 0130103101-9780130103109/gases-10/partial-pressure-80/collecting-gases-over-water-353-5536 Collecting gas over water View on Boundless.com Gases > Partial Pressure

8. Free to share, print, make copies and changes. Get yours at www.boundless.com Appendix

9. Key terms Dalton's Law of Partial Pressures the total pressure exerted by the mixture of non-reactive gases is equal to the sum of the partial pressures of each individual gas; also known as Dalton's Law of Partial Pressures mole fraction number of moles of one particular gas divided by the total moles of gas in the mixture pneumatic trough device used to collect a gas over water; the height of water displaced in the tube can be used to determine the total pressure inside the tube Free to share, print, make copies and changes. Get yours at www.boundless.com Gases

10. Collecting a Gas Over Water How to calculate the pressure of a gas sample if it has been collected over water. Free to share, print, make copies and changes. Get yours at www.boundless.com View on Boundless.com Gases

11. Collecting gas over water When collecting oxygen gas and calculating its partial pressure by displacing water from an inverted bottle, the presence of water vapor in the collecting bottle must be accounted for; this is easily accomplished using Dalton's Law of Partial Pressures. Free to share, print, make copies and changes. Get yours at www.boundless.com Wikibooks. "Chemical Principles/Gas Laws and the Kinetic Theory." CC BY-SA 3.0 http://en.wikibooks.org/wiki/Chemical_Principles/Gas_Laws_and_the_Kinetic_Theory View on Boundless.comCC BY-SA 3.0 http://en.wikibooks.org/wiki/Chemical_Principles/Gas_Laws_and_the_Kinetic_TheoryView on Boundless.com Gases

12. Dalton Dr.McCord describes Dalton's Law of Partial Pressures. Free to share, print, make copies and changes. Get yours at www.boundless.com View on Boundless.com Gases

13. Free to share, print, make copies and changes. Get yours at www.boundless.com Gases On the top of Mt. Everest, the atmospheric pressure is approximately 34 kPa. If the gas ratios are the same as at sea level (i.e., 1/5 O2 and 4/5 N2), what is the partial pressure of O2 at the peak? A) 17.0 kPa B) 6.8 kPa C) 27.2 kPa D) 11.3 kPa

14. Free to share, print, make copies and changes. Get yours at www.boundless.comwww.boundless.com Boundless - LO. "Boundless." CC BY-SA 3.0 http://www.boundless.com/CC BY-SA 3.0http://www.boundless.com/ Gases On the top of Mt. Everest, the atmospheric pressure is approximately 34 kPa. If the gas ratios are the same as at sea level (i.e., 1/5 O2 and 4/5 N2), what is the partial pressure of O2 at the peak? A) 17.0 kPa B) 6.8 kPa C) 27.2 kPa D) 11.3 kPa

15. Free to share, print, make copies and changes. Get yours at www.boundless.com Gases Gas from a lighter was collected over water. The loss of mass of the lighter was 128 mg and the volume of the collected gas was 0.060 L. If the temperature and pressure in the room were at 35oC and 1 atm, what is the molar mass of the gas? (Note: Partial pressure of water vapor at 35oC is 42.2 mm Hg.) A) 52.1 g/mol B) 55.2 g/mol C) 53.6 g/mol D) 49.4 g/mol

16. Free to share, print, make copies and changes. Get yours at www.boundless.comwww.boundless.com Boundless - LO. "Boundless." CC BY-SA 3.0 http://www.boundless.com/CC BY-SA 3.0http://www.boundless.com/ Gases Gas from a lighter was collected over water. The loss of mass of the lighter was 128 mg and the volume of the collected gas was 0.060 L. If the temperature and pressure in the room were at 35oC and 1 atm, what is the molar mass of the gas? (Note: Partial pressure of water vapor at 35oC is 42.2 mm Hg.) A) 52.1 g/mol B) 55.2 g/mol C) 53.6 g/mol D) 49.4 g/mol

17. Attribution Steve Lower's Website. "gas mixtures and Dalton's law." CC BY-SA http://www.chem1.com/acad/webtext/gas/gas_3.html#5ACC BY-SAhttp://www.chem1.com/acad/webtext/gas/gas_3.html#5A Wikibooks. "Chemical Principles/Gas Laws and the Kinetic Theory." CC BY-SA 3.0 http://en.wikibooks.org/wiki/Chemical_Principles/Gas_Laws_and_the_Kinetic_TheoryCC BY-SA 3.0 http://en.wikibooks.org/wiki/Chemical_Principles/Gas_Laws_and_the_Kinetic_Theory Wiktionary. "ideal gas law." CC BY-SA 3.0 http://en.wiktionary.org/wiki/ideal+gas+lawCC BY-SA 3.0http://en.wiktionary.org/wiki/ideal+gas+law Wikipedia. "Ideal Gas Equation." CC BY-SA 3.0 http://en.wikipedia.org/wiki/Ideal%20Gas%20EquationCC BY-SA 3.0http://en.wikipedia.org/wiki/Ideal%20Gas%20Equation Wikipedia. "Dalton's law of partial pressures." CC BY-SA 3.0 http://en.wikipedia.org/wiki/Dalton's%20law%20of%20partial%20pressuresCC BY-SA 3.0 http://en.wikipedia.org/wiki/Dalton's%20law%20of%20partial%20pressures Connexions. "The Ideal Gas Law." CC BY 3.0 http://cnx.org/content/m12598/latest/?collection=col10264/latestCC BY 3.0http://cnx.org/content/m12598/latest/?collection=col10264/latest Wikipedia. "Dalton's Law of Partial Pressure." CC BY-SA 3.0 http://en.wikipedia.org/wiki/Dalton%2527s_Law_of_Partial_PressureCC BY-SA 3.0 http://en.wikipedia.org/wiki/Dalton%2527s_Law_of_Partial_Pressure Steve Lower's Website. "gas mixtures and Dalton's law." CC BY-SA http://www.chem1.com/acad/webtext/gas/gas_3.html#SEC4CC BY-SA http://www.chem1.com/acad/webtext/gas/gas_3.html#SEC4 Wiktionary. "Boyle's law." CC BY-SA 3.0 http://en.wiktionary.org/wiki/Boyle's+lawCC BY-SA 3.0http://en.wiktionary.org/wiki/Boyle's+law Free to share, print, make copies and changes. Get yours at www.boundless.com Gases