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What colour the flame is has totally got to do with how much oxygen is allowed into the Bunsen, the flame can be anywhere between a bight orange to blue, all the way to being almost unnoticeable. This is what make them dangerous if unattended as you wont know there burning until you are. Low air easily visible flame, High air flow, and it becomes very difficult to see.

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14y ago
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9y ago

The color of a flame when a Bunsen burner has its air hole open is blue. The flame is usually blue because more oxygen is getting into the Bunsen burner.

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11y ago

the color of the flame is a violet - blue color

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11y ago

inner= dark blue outer=light blue

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7y ago

The flame is blue.

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6y ago

The flame is yellow.

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Aiden Grierson

Lvl 2
1y ago

blue

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13y ago

YELLOW

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6y ago

Blue.

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13y ago

brown

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Q: What is the black substance produced when a Bunsen burner air hole is closed?
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Related questions

Bunsen burner blue flame?

The blue flame of the Bunsen burner is when it is hottest. The yellow flame is the safety flame. you should always start the burner on the safety flame which is produced when the holes on its base are closed.


What is the safest flame on a Bunsen burner?

when you light up the burner you should see that the Bunsen burners air hole is closed that is the safest flame


Is the hole open or closed on a Bunsen burner to make a safety flame?

It is closed to make a safety flame.


What is the name when the air hole is closed on a Bunsen burner?

It is a luminous yellow flame. 🔥


What colour is the flame when the airport is open and when the airport is closed on a Bunsen Burner?

its a orange colour when closed and a blue colour when is open


Word equation for the air hole on a Bunsen burner is closed?

Ch4 + 5o2 ------> co2 + 2h2o +302


Why does a yellow flame appear on the Bunsen burner when the air hole is closed?

In a laboratory under normal conditions and with a closed oxygen valve, a Bunsen burner burns with yellow flame (also called a safety flame). This is due to the burning of very fine soot particles that are produced in the flame. With increasing oxygen supply, less black body-radiating soot is produced due to a more complete combustion and the reaction creates enough energy to producing a blue appearance flame.


Why do you need to ensure that the air hole is closed before you light the bunsen burner?

it's to prevent a strike-back


What happens when the hole on a Bunsen burner is closed?

The "air-hole" of a bunsen burner allows some of the flame to escape so that the heating flame does not become too hot. A flame that is too hot can damage laboratory equipment. When the air hole is closed it is a yellow sooty flame like the fires we have at home.


When air hole of the Bunsen burner is closed what is the observation?

When the air valve in closed a yellow luminous flame is observed due to carbon particles from in incomplete combustion.


Can the the flame of closed air hole Bunsen burner can used for heating?

Yes,it can .But it might take longer time to heat


When you are not using a Bunsen burner but wish to leave the flame on you should always leave the air hole closed why?

It is less hot