Questions and Answers
What percentage of the atmosphere is oxygen?
21%
What is the temperature of the room in which the experiment is being conducted?
25°C
What is the concentration of oxygen in the surface layer of water?
0.27 millimoles per liter
What is the formula for Henry's law?
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What are the units of the constant KH?
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What can be calculated using Henry's law and the concentration of oxygen?
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Why does the author want to measure the concentration of oxygen in the surface layer of water?
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What is the outcome of the experiment when the author measures the concentration of oxygen in the surface layer of water?
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What is the approximate solubility of carbon dioxide compared to oxygen at 25 degrees Celsius?
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At which temperature is the solubility of carbon dioxide compared to oxygen in the lungs?
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What is the difference between the solubility of carbon dioxide in water and in blood?
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Why is there a huge difference in concentrations between carbon dioxide and oxygen?
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What is the approximate solubility of carbon dioxide compared to oxygen at 37 degrees Celsius?
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What is the relationship between the solubility of gases and temperature?
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What percentage of carbon dioxide is used in the experiment?
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What happens to the carbon dioxide molecules in the water over time?
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What is the concentration of carbon dioxide in the water?
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Why is the concentration of carbon dioxide higher than oxygen in the water?
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What is the role of the K sub H according to Henry's law?
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Why does the carbon dioxide not want to leave the water?
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What happens to the carbon dioxide when it enters the water?
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What is the formula for the reaction of carbon dioxide with water?
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Why does the oxygen leave the water readily?
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What is the main difference between the carbon dioxide and oxygen experiments?
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Study Notes
Oxygen and Carbon Dioxide in Water
- Oxygen is 21% of the atmosphere and enters a cup of water at room temperature (25°C) with a concentration of 0.27 millimoles per liter.
- Henry's law relates the partial pressure of oxygen to its concentration in water, with a constant (KH) of 769 liters × atmospheres per mole.
- The concentration of oxygen in water is low due to its low solubility.
Carbon Dioxide in Water
- A hypothetical environment with 21% carbon dioxide is created, and the concentration of carbon dioxide in water is measured at 7.24 millimoles per liter, significantly higher than oxygen.
- The partial pressure of carbon dioxide is the same as oxygen, but the concentration is higher due to its higher solubility in water.
- The KH value for carbon dioxide is 29 liters × atmospheres per mole, lower than oxygen.
Comparison of Oxygen and Carbon Dioxide
- Carbon dioxide is about 26 times more soluble than oxygen in water at 25°C.
- The solubility of carbon dioxide is higher due to its ability to bind with water and form bicarbonate and protons, making it more comfortable in water.
- At 37°C, the temperature of the human body, carbon dioxide is about 22 times more soluble than oxygen in blood.
Importance of Solubility
- The difference in solubility between oxygen and carbon dioxide affects their concentrations in the body, particularly in the lungs.
- The net difference between what's going in and what's coming out of the body determines the concentration of oxygen and carbon dioxide.
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Description
Learn about the concentration of oxygen and carbon dioxide in water, including Henry's law and their solubility.
