Dalton's Law

Front

What is Dalton's Law?

Back

Dalton's Law states that in a mixture of non-reacting gases, the total pressure exerted is equal to the sum of the partial pressures of each individual gas.

Front

Define partial pressure.

Back

Partial pressure is the pressure that a single gas in a mixture would exert if it occupied the entire volume alone at the same temperature.

Front

What is the formula for calculating total pressure using Dalton's Law?

Back

P_total = P1 + P2 + P3 + ... + Pn, where P1, P2, P3, etc. are the partial pressures of the individual gases.

Front

If the total pressure of a gas mixture is 760 torr and the partial pressure of oxygen is 200 torr, what is the partial pressure of the other gases?

Back

P_other = P_total - P_oxygen = 760 torr - 200 torr = 560 torr.

Front

What is the vapor pressure of water at 25° C?

Back

The vapor pressure of water at 25° C is 23.8 torr.

Front

How do you calculate the pressure of a dry gas collected over water?

Back

Pressure of dry gas = Total pressure - Vapor pressure of water.

Front

In a container with oxygen (2.00 atm), carbon dioxide (3.00 atm), and helium (4.00 atm), what is the total pressure?

Back

Total pressure = 2.00 atm + 3.00 atm + 4.00 atm = 9.00 atm.

Front

What is the partial pressure of water vapor if the total pressure is 864 mmHg and the partial pressures of hydrogen and nitrogen are 220 mmHg and 410 mmHg respectively?

Back

Partial pressure of water vapor = Total pressure - (P_hydrogen + P_nitrogen) = 864 mmHg - (220 mmHg + 410 mmHg) = 234 mmHg.

Front

What is the significance of Dalton's Law in real-world applications?

Back

Dalton's Law is crucial in fields like chemistry, meteorology, and respiratory physiology, as it helps in understanding gas mixtures and their behaviors.

Front

What happens to the total pressure if one gas is removed from a mixture?

Back

The total pressure decreases by the amount of the partial pressure of the removed gas.