A sample of chlorine gas is collected by water displacement at 23C. If the atmospheric pressure is 751 torr, what is the partial pressure due to the chlorine?
Ptotal = pCl2 + pH2O
Look up the vapor pressure of H2O at 23 C (in torr). Ptotal = 751 torr. Calculate pCl2.
To determine the partial pressure of chlorine gas collected by water displacement, we need to take into account the atmospheric pressure and the vapor pressure of water at 23°C.
1. First, let's find the vapor pressure of water at 23°C.
The vapor pressure of water at 23°C is approximately 21 torr.
2. Next, subtract the vapor pressure of water from the atmospheric pressure to obtain the partial pressure due to the chlorine.
Partial pressure due to chlorine = atmospheric pressure - vapor pressure of water
Partial pressure due to chlorine = 751 torr - 21 torr
Partial pressure due to chlorine = 730 torr
Therefore, the partial pressure due to chlorine gas collected by water displacement at 23°C is 730 torr.
To find the partial pressure of chlorine gas, we need to use Dalton's Law of Partial Pressures. According to this law, the total pressure of a mixture of gases is equal to the sum of the partial pressures of each individual gas.
In this case, the total pressure is the atmospheric pressure, which is given as 751 torr. We are interested in the partial pressure of the chlorine gas.
To collect the sample of chlorine gas by water displacement, we assume that the gas is collected over water. This means that the gas collects in a container, and the water level inside the container rises to a certain height due to the displacement of the gas.
The partial pressure of chlorine can be determined by subtracting the vapor pressure of water from the total pressure.
1. Find the vapor pressure of water at 23°C: The vapor pressure of water at different temperatures can be found in a reference table or calculated using empirical equations. At 23°C, the vapor pressure of water is approximately 21 torr.
2. Subtract the vapor pressure of water from the total pressure:
Partial pressure of chlorine gas = Total pressure - Vapor pressure of water
Partial pressure of chlorine gas = 751 torr - 21 torr
Partial pressure of chlorine gas = 730 torr
Therefore, the partial pressure due to the chlorine gas is approximately 730 torr.