1st slide
Bunsen burner
2nd slide
Structure
For laboratory heating usually gas burners are used
burner tube
adjustable collar
nozzle
gas space
gas inlet tube
3rd slide
Principle of operation
The gas gets into the tube through the nozzle of the burner
There are two air-vents opposite each other on the nozzle
The air-vents can be closed or opened by turning the collar
If the air-vents are closed, the flame at the end of the tube is luminous and sooting
4th slide
Application: flame colouring of salts
lithium
sodium
potassium
