Question

How do you calculate the partial pressure of hydrogen gas?

Answer 1

The same way you calculate the partial pressure of any other gas.........

Explanation:

.....i.e. in a gaseous mixture, the partial pressure exerted by a component gas is the same as the pressure it would exert if it ALONE occupied the container. The total pressure is the sum of the individual partial pressures.

I have just restated `"Dalton's Law of Partial Pressures"`, and using the Ideal Gas Equation, we say that `P_1=(n_1RT)/V`, `P_2=(n_2RT)/V`,.......... `P_n=(n_nRT)/V`, etc.

And thus `P_"Total"` `=` `P_1+P_2+..........P_n`

`=` `(n_1+n_2+n_3.........)xx(RT)/V`.

The partial pressure exerted by an individual component is thus proportional to `P_"Total"`, with the constant of proportionality being `n_i/(n_1+n_2+n_3...)`, the mole fraction.

This is all abstract, but you can bring an actual problem to the table.