# What is the equation for Dalton's law of partial pressure?

##### 1 Answer

#### Explanation:

In a gaseous mixture, the partial pressure exerted by a component, is the same as the pressure it would exert if it ALONE occupied the container. The total pressure is the sum of the individual pressures. The mole fraction of a component gas is proportional to the partial pressure.

Clearly, the total number of moles of gas is..........

And

But given ideality, then

So

And

Again,

It is worthwhile spending a bit of time on the equation, and checking problems where you use it .