Combustion of sodium
The flask contains sodium (a greyish metal kept under petrol), the cylinder is full of oxygen.
We cut a little piece of this soft metal.
Le sodium is introduced in a combustion tube.
The sodium is ignited in air.
In oxygen the sodium burns producing a yellow flame. The product of combustion is a white solid, hardly visible.
Let's introduce a yellow bromothymol solution.
It turns to blue.
The flask contains sodium (a greyish metal kept under petrol), the cylinder is full of oxygen.
