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Oxygen Diffusion in Water

Q.

The figure shows:

  • A sealed bag filled with air that is permeable to oxygen (O2), submerged in a beaker of water
  • The concentrations of oxygen gas in the bag and dissolved in water
  • Oxygen molecules represented by white circles
  • One oxygen molecule labeled “X”

After the initial conditions shown above, the system rapidly reaches equilibrium where there is the same concentration of oxygen molecules on both sides of the permeable bag. Where would you predict the oxygen molecule labeled “X” would be located just before equilibrium is reached?
A. In the bag

B. In the water

C. Cannot predict

 

Explain your reasoning about where the oxygen molecule labeled “X” would be located just before equilibrium is reached.

 

Where would you predict the oxygen molecule labeled “X” would be located after equilibrium is reached?
A. In the bag

B. In the water

C. Cannot predict

 

Explain your reasoning about where the oxygen molecule labeled “X” would be located after equilibrium is reached.

Audiences:

Undergraduate

Topics:

Diffusion,  Physiology

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