Homemade firefighting foam

Homemade firefighting foam

We can produce carbon dioxide gas using sodium hydrogen carbonate and acetic acid. The carbon dioxide puts out the flame.

01:45

Chemistry

Keywords

firefighting foam, firefighting, sodium bicarbonate, acetic acid, carbon dioxide, baking powder, baking soda, foam, foaming, combustion, oxidation, candle, condition for combustion, oxygen, stum, fermentation, wine cellar, physical, experiment, chemical reaction, chemistry

On-screen labels

baking soda, vinegar, candle, two beakers, Place the candle into one of the beakers and light it., Then pour vinegar onto the baking soda in the other beaker., The mixture starts to bubble and foam up., Tilt the beaker filled with the mixture over the candle so that the foam does not flow out of it., Observe what happens to the candle., Baking soda and the acetic acid react with each other and form carbon dioxide., The carbon dioxide gas is heavier than air (it is denser than air), therefore it remains on the bottom of the beaker., When you tilt the beaker, the carbon dioxide flows out of the beaker onto the candle., The flame goes out because carbon dioxide does not sustain combustion and displaces the oxygen from the fire., Why does the flame of the candle go out?
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