CO2 Extinguishes Candle

  • Author:
  • Published: 02 December 2019
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA

A candle burns in a glass which is at least twice as high as the candle. Around the candle, we heap baking powder (sodium hydrogen carbonate) and drizzle vinegar (acid) on it.

NaHCO3 + H3O+ --> Na+ + CO2 + 2 H2O

CO2 forms. It is heavier than air and prevents the supply of air or oxygen. The candle is extinguished.


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