Table of Contents
- 1 What is the purpose of the air hole in a Bunsen burner?
- 2 Why does a Bunsen burner with the air hole closed produce a yellow flame?
- 3 When the hole of Bunsen burner is closed we get?
- 4 What precautions should be taken when lighting the Bunsen burner?
- 5 Should the collar be open or closed when you light the Bunsen burner?
What is the purpose of the air hole in a Bunsen burner?
The other critical component of a Bunsen burner is the air hole. This is located near the bottom of the chimney, just above the gas inlet. The air hole allows pre-mixing of air and gas before combustion occurs at the top of the chimney.
Why does a Bunsen burner with the air hole closed produce a yellow flame?
When the air-hole is closed, however, there is less oxygen available. This results in incomplete combustion of the gas. The color of the flame changes to yellow and the flame is wavy. The yellow color is produced from particles of carbon (soot) in the flame which results from incomplete combustion of the methane gas.
When the hole of Bunsen burner is closed we get?
Therefore, when we light a Bunsen burner and adjust the air hole at the base to get different types of flames/ presence of smoke we get a yellow, sooty flame if the holes of the burner are blocked and the substance does not get sufficient oxygen supply and we get a blue flame if the holes of the burner are opened and …
When starting a Bunsen burner the air hole must be?
Place the Bunsen burner on a heat-resistant mat 30 to 40 cm from the edge of the bench. Make sure the air hole is closed (unless you are lighting the gas with a piezo-electric lighter, in which case air hole should be half open).
What is the color of the flame when the air vents are closed?
yellow
A lit Bunsen burner with closed or partially closed air vents gives a yellow safety flame. Closing the air vents makes it easier to light the Bunsen burner and to observe the flame.
What precautions should be taken when lighting the Bunsen burner?
Because they produce an open flame, however, certain safety precautions should be taken to minimize the risk of injury when using a Bunsen burner.
- 12 Inches of Clearance.
- Never Leave Flames Unattended.
- Allow to Cool Prior to Handling.
- Inspect Prior to Use.
- Ignite with Sparker.
- Turn Off Gas After Use.
Should the collar be open or closed when you light the Bunsen burner?
Lighting Bunsen Burner: Close needle valve and collar. Open gas valve fully.