what is the partial pressure of 02 collected over water at 25 degree C and 630 torr (vapor pressure of H20 at 25 degree C is 23.8 torr)
Dalton's Law tell us that the total pressure is the sum of the partial pressures of the gases.
Ptotal = PO2 + PH2O
630 torr = PO2 + 23.0
Solve for PO2.
To calculate the partial pressure of O2 collected over water, we need to use Dalton's Law of Partial Pressures. According to this law, the total pressure exerted by a mixture of gases is equal to the sum of the partial pressures of each individual gas.
In this case, the total pressure is 630 torr, and the vapor pressure of water at 25 degrees Celsius is 23.8 torr. The partial pressure of O2 can be calculated by subtracting the vapor pressure of water from the total pressure.
Partial pressure of O2 = Total pressure - Vapor pressure of water
Partial pressure of O2 = 630 torr - 23.8 torr
Partial pressure of O2 = 606.2 torr
Therefore, the partial pressure of O2 collected over water at 25 degrees Celsius and 630 torr is 606.2 torr.