Question

question 13
2 pts
turbulence and mixing of natural waters helps to increase levels of dissolved oxygen.
true
false
question 14
2 pts
how does the solubility of oxygen vary with the temperature of water?
oxygen solubility increases as temperature increases
oxygen solubility does not change as a function of water temperature
oxygen solubility decreases as temperature increases

Explanation:

• For Question 13: Turbulence and mixing in natural waters increase the surface area of water exposed to air. This allows more oxygen from the air to dissolve into the water, thus increasing dissolved oxygen levels.
• For Question 14: According to Henry's law and general solubility trends for gases in liquids, as the temperature of water increases, the kinetic energy of water molecules and dissolved oxygen molecules increases. The dissolved oxygen molecules have more energy to escape from the water - air interface, so oxygen solubility decreases as temperature increases.

Answer:

• Question 13: True
• Question 14: oxygen solubility decreases as temperature increases