SE: Bunsen burner

Question 1

air hole

Answer 1

allows air to enter the burner

Question 2

define

barrel

Answer 2

where gas and air are allowed to mix

Question 3

base

Answer 3

supports the burner

Question 4

collar

Answer 4

adjusts the intake of air

Question 5

gas tap

Answer 5

controls the amount of gas supplied to the burner

Question 6

rubber tubing

Answer 6

allows gas to enter the burner from a gas source

Question 7

luminous flame features

Answer 7

obtained when air hole is closed. unsteady, less hot and more visible. orange/yellowish-orange on outside, blue on inside. used when Bunsen burner is left unattended for a short while.

Question 8

non-luminous flame features

Answer 8

obtained when air hole is opened. steady, hotter and less visible. pale blue on outside, dark blue on inside. used for heating.

Question 9

safety precautions when using Bunsen burner

Answer 9

1) close the air hole before lighting the burner. this prevents too much oxygen from entering the burner and thus a phenomenon known as strike back, where the flame burns within the barrel.
2) do not touch the barrel of the Bunsen burner while in use/immediately after use.