Help With Gas/Liquid Pressure/Volume

[Brzostek]

1. Assume that a high dissolved oxygen level is 10 mg/L. If you have a liter (L) of water and removed all of the oxygen from it what volume would it occupy? (Use the ideal gas law and assume that P = 1 atm = 1 bar and that temperature is 25 C).



2. PV = nRT



3. Don't know how to use this equation with a gas and liquid.

 

[Andrew Mason]

1. Assume that a high dissolved oxygen level is 10 mg/L. If you have a liter (L) of water and removed all of the oxygen from it what volume would it occupy? (Use the ideal gas law and assume that P = 1 atm = 1 bar and that temperature is 25 C).

So how many milligrams of O₂ would be removed (assume there are 10 mg/L dissolved in the water)? How many moles of O₂ is that? How much volume will that amount of O₂ occupy at 1 atm = 101325 Pa. and 25C (Hint: use PV=nRT. What is the temperature in K?)?


AM