- #1
Drew Sandlin
- 5
- 0
Hello all,
I'm a bit new to to the forum, but from the posts I've read, I can say that this is a fantastic site. I have a fish tank with some live plants in it, and I add CO2 to the water by putting some sugar, water and yeast in a two liter bottle and pumping the gas into the water. Worked great for the plants.
However, I am curious how I would go about measuring the amount of alcohol that the yeast produces by measuring the density of the mixture before I start a batch and after. I initially had thought of something like this:
1000(1 - x) + 789(x) = Density of mixture after some time
where the 1000 represents the density of water in kg/m^3, and the 789 for the ethanol and x is the fraction of ethanol. You can noticeably observe the level of fluid in the two liter bottle rise slightly over the course of a few days, and so I would imagine that the density goes down after some fermentation has occured. Is this a solid approach to use? How, if necessary should I account for the CO2 that leaves the mixture?
Any thoughts would be greatly appreciated.
Drew
I'm a bit new to to the forum, but from the posts I've read, I can say that this is a fantastic site. I have a fish tank with some live plants in it, and I add CO2 to the water by putting some sugar, water and yeast in a two liter bottle and pumping the gas into the water. Worked great for the plants.
However, I am curious how I would go about measuring the amount of alcohol that the yeast produces by measuring the density of the mixture before I start a batch and after. I initially had thought of something like this:
1000(1 - x) + 789(x) = Density of mixture after some time
where the 1000 represents the density of water in kg/m^3, and the 789 for the ethanol and x is the fraction of ethanol. You can noticeably observe the level of fluid in the two liter bottle rise slightly over the course of a few days, and so I would imagine that the density goes down after some fermentation has occured. Is this a solid approach to use? How, if necessary should I account for the CO2 that leaves the mixture?
Any thoughts would be greatly appreciated.
Drew
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