Podcast
Questions and Answers
What percentage of the atmosphere is oxygen?
What percentage of the atmosphere is oxygen?
- 20%
- 22%
- 25%
- 21% (correct)
What is the temperature of the room in which the experiment is being conducted?
What is the temperature of the room in which the experiment is being conducted?
- 30°C
- 27°C
- 22°C
- 25°C (correct)
What is the concentration of oxygen in the surface layer of water?
What is the concentration of oxygen in the surface layer of water?
- 2.7 millimoles per liter
- 0.27 millimoles per liter (correct)
- 27 millimoles per liter
- 0.027 millimoles per liter
What is the formula for Henry's law?
What is the formula for Henry's law?
What are the units of the constant KH?
What are the units of the constant KH?
What can be calculated using Henry's law and the concentration of oxygen?
What can be calculated using Henry's law and the concentration of oxygen?
Why does the author want to measure the concentration of oxygen in the surface layer of water?
Why does the author want to measure the concentration of oxygen in the surface layer of water?
What is the outcome of the experiment when the author measures the concentration of oxygen in the surface layer of water?
What is the outcome of the experiment when the author measures the concentration of oxygen in the surface layer of water?
What is the approximate solubility of carbon dioxide compared to oxygen at 25 degrees Celsius?
What is the approximate solubility of carbon dioxide compared to oxygen at 25 degrees Celsius?
At which temperature is the solubility of carbon dioxide compared to oxygen in the lungs?
At which temperature is the solubility of carbon dioxide compared to oxygen in the lungs?
What is the difference between the solubility of carbon dioxide in water and in blood?
What is the difference between the solubility of carbon dioxide in water and in blood?
Why is there a huge difference in concentrations between carbon dioxide and oxygen?
Why is there a huge difference in concentrations between carbon dioxide and oxygen?
What is the approximate solubility of carbon dioxide compared to oxygen at 37 degrees Celsius?
What is the approximate solubility of carbon dioxide compared to oxygen at 37 degrees Celsius?
What is the relationship between the solubility of gases and temperature?
What is the relationship between the solubility of gases and temperature?
What percentage of carbon dioxide is used in the experiment?
What percentage of carbon dioxide is used in the experiment?
What happens to the carbon dioxide molecules in the water over time?
What happens to the carbon dioxide molecules in the water over time?
What is the concentration of carbon dioxide in the water?
What is the concentration of carbon dioxide in the water?
Why is the concentration of carbon dioxide higher than oxygen in the water?
Why is the concentration of carbon dioxide higher than oxygen in the water?
What is the role of the K sub H according to Henry's law?
What is the role of the K sub H according to Henry's law?
Why does the carbon dioxide not want to leave the water?
Why does the carbon dioxide not want to leave the water?
What happens to the carbon dioxide when it enters the water?
What happens to the carbon dioxide when it enters the water?
What is the formula for the reaction of carbon dioxide with water?
What is the formula for the reaction of carbon dioxide with water?
Why does the oxygen leave the water readily?
Why does the oxygen leave the water readily?
What is the main difference between the carbon dioxide and oxygen experiments?
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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