Does fermentation always produce CO2 ?

We did a fermentation of yeast lab with sucrose solutions [1%, 5% and 10%] and it asks what causes bubbles to form in the test tubes, it is probably CO2 but why exactly does CO2 cause bubbles, also does fermentation (an anaerobic process) always produce CO2 ? We did not get too much background information so we must explain ourselves how we know this with cell resp. background knowledge

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  • 8 years ago
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    Yeast fermentation (alcohol fermentation) produces gas, that is CO2, and is the reason why bubbles form.

    But note that not all fermentation gives carbondioxide gas. Lactic acid fermentation does not produce any gas. So a test result on that will not give any gas.

    Source(s): .
  • 4 years ago

    properly,sodium carbonate is refering to Na2CO3 ,or NaHCO3? if it refers back to the first one..as i comprehend ...that's decompostion received't happend in basic terms 2NaHCO3 =>Na2CO3+CO2+ H2O as for the second one question ... properly a) is in all probability to be corect using the undeniable fact that is a non metallic ,it received't type ionic oxides it would want to also type a covalent chloride ...yet i'm no longer constructive if that's sizeable as for d) S isn't selenium Hydrogen also sorts ionic compounds with non-metals(like H2O,HCl)even if it also sorts covalent ones...a is corect

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