The apparatus:
A little piece of sodium is located in the test tube. The graduated syringe is filled with chlorine.

The sodium is heated. After a few seconds it begins to melt. It looks now like a silvery drop.

The tap of the syringe is opened and chlorine is introduced upon the molten sodium. Reaction between sodium and chlorine starts.

Energy is liberated as light and heat.

Introducing more or less chlorine, we may control the speed of this reaction.

The chlorine is almost consumed. The reaction slows down

We see the test tube with the product of this reaction. Sodium chloride is a white solid. The black color is due to impurities.

The reaction between sodium and chlorine

The apparatus. A little piece of sodium is located in the test tube. The graduated syringe is filled with chlorine.