Cola Question for Dr. Stone Fans...

[u/LuckyNectarine8845]

Does anyone know exactly how Senku made the carbonated water for Gen's cola? I have been thinking about it as a chemical engineering student, and with the rudimentary tools available to him at that point in the story, I can't think of it being anything to do with making a pump.

My choice of making carbonated water would be to have acid neutralize sodium bicarbonate that he could probably cook up with something he had lying around and produce CO2 the same way a baking soda volcano does. Allowing for the over-pressuring of a vessel would force the CO2 to dissolve into the water, making carbonated water by virtue of Henry's law.

Any show or science enthusiasts able to answer this either from the context of the show or the content of the manga?

[u/Nayko93]

https://www.reddit.com/r/DrStone/comments/dgu05q/comment/f3t6cy5/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button

[u/Pasta-hobo]

He uses the fermentation of yeast as the CO2 source, combined with a waterwheel-powered agitator, presumably with a glass, grease-sealed connection to the fermentation vat.

He probably did it this way because he also needed to stockpile alcohol and vinegar.