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Why do laboratory burners have adjustable air vents?

April 26, 2017Adjustable air burners laboratory vents

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Why do laboratory burners have adjustable air vents?

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The more air there is, the more oxygen there is. The more oxygen there is, the bluer the flame is, and the less smoke. It is called Complete Combustion, where there is sufficient oxygen for the gas to combust entirely, so there is no smoke/soot, and a non-luminous flame.