Question

A laboratory hydrogen generator collects the gas produced by bubbling it through water. The total pressure of the gas collected is 751 mmHg. The temperature is 34 °C, at which water vapor pressure is 40.0 mmHg. Calculate the partial pressure of the hydrogen.

Answer 1

`711\ \text{mmHg}`

Step-by-step explanation:

`P_(total)` = Total pressure = 751 mmHg

`P_(water)` = Vapor pressure = 40 mmHg

`P_(gas)` = Pressure of gas

The total pressure in a system is given by Dalton's law

`P_(total)=P_(gas)+P_(water)\\\Rightarrow P_(gas)=P_(total)-P_(water)\\\Rightarrow P_(gas)=751-40\\\Rightarrow P_(gas)=711\ \text{mmHg}`

The partial pressure of the hydrogen is
`711\ \text{mmHg}`