Question

Calculate the partial
pressure of argon in a
gas mixture with a total
pressure of 2.4 atm.
The partial pressures
of the other gases are:
O2 = 128.0 mmHg
He = 167.5 mmHg and
Ne= 760.0 mmHg

Answer 1

The required partial pressure of argon gas present in the mixture is 1.02 atm.

What is Dalton law of gas?

Dalton's law of gas states that total pressure of any mixture of gas is sum of the partial pressure of all the gases present in that mixture.

Given that,

Total pressure of mixture = 2.4 atm

Partial pressure of argon = ?

Partial pressure of oxygen = 128 mmHg = 0.168 atm

Partial pressure of helium = 167.5 mmHg = 0.220 atm

Partial pressure of neon = 760 mmHg = 1 atm

On putting all these values according to the definition we get the partial pressure of argon gas as:
Partial pressure of argon = 2.4 - (0.168 + 0.22 + 1) = 1.02 atm

Hence required partial pressure of argon gas is 1.02 atm

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