27) Lab Essentials : Bunsen Burner

Microbiology Essentials :
27) Bunsen Burner :
The Bunsen burner was created in 1855, and is named after its inventor, Doctor Robert Bunsen.

He was a German Chemist, who taught and performed research at the University of Heidelberg. In 1854, a new laboratory at the university was designed with coal-gas lines running to it.

Here you will better understand how :

https://youtu.be/N7ssCM3qM3U

The Bunsen burner is based on the principle of adjustable gas combustion with air supply. By varying the quantity of air supplied, different burner temperatures can be achieved.

   ✓ STEPS TO LIGHT BUNSEN BURNER :

1.Check connections to burner and desk outlet valve.

2.Close needle valve and collar.

3.Open desk outlet valve fully.

4.Open needle valve 1/2 turn.

5.Use the spark lighter to light the flame.

6.Adjust collar and needle valve till you see a blue flame.

Bunsen burner is made entirely of metal in order to function properly, Bunsen burners must have a barrel :

(A) That's approximately five inches long, a collar 

(B) with air holes 

(C) a gas intake 

(D) and gas valve 

(E) and a stand 

(F) to keep all of the pieces from making contact with a work surface.

The blue flame, can reach temperatures of approximately 500°C and is almost invisible in a bright room.

             The Bunsen Burner Flame

There are two main types of flame produced by a Bunsen burner – the yellow flame and the blue flame.