Question

80 liters of oxygen is collected over water at ${50}^{o}C$. Atmospheric pressure in the room is 96.00 kPa. What is the partial pressure of the oxygen ?

• A. $82.55$
• B. $83.66$
• C. $81$
• D. None of these

Answer 1

The correct option is B $83.66$

At ${50}^{0}C$, the vapour pressure of water is $12.34kPa$

To find the vapour pressure of the oxygen along, you subtract the pressure of the water from the total pressure:

$96-12.34=83.66kPa$