Summary:
A summary of an experiment conducted to determine the volume occupied by one mole of oxygen molecules at STP, including its procedures, results, and possible sources of error.
Finding The Molar Volume of Oxygen at STP
Aim: To find the volume occupied by one mole of oxygen molecules at STP.
Materials and equipment:
- Potassium permanganate
- Glass wool (fibreglass)
- Tongs and gloves for handling glass wool
- Pyrex test-tube with one-holed stopper to fit
- Gas syringe
- Bunsen burner
- Retort stand and clamp
- Glass tubing
- Rubber tubing
Safety! : Wear gloves and use tongs when handling glass wool. Do not breathe in its glass fibres.
Introduction: It is not necessary; when finding the molar volume, to weigh one mole oxygen at 273K and 101.3x 100000Pa. Weighing such a large volume would be difficult and wasteful, and how long would you have to wait for a day on which the exact conditions of STP happen to occur. Instead, we can take any convenient mass of oxygen and measure its volume, temperature and pressure. Knowing the molar mass, we can.....
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