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A comment on 2+1=4, by quinoa. Parent comment

Re:2+1=4, by quinoa by jld on Friday July 03, 2020 @06:33PM (#23728210)
I was just talking to a friend about how 1 part water plus 1 part ethanol becomes 1.92 parts solution.

This raised a question for me that I have yet to research/answer. Maybe one of you knows... if the above solution is 50% ABV, what happens if I add one more part alcohol to the solution? Is it now 66.6% ABV? More? Less? How does ABV take into account the fact that this solution is packed together tighter than its constituent parts?

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Re:2+1=4, by quinoa by tedunangst on Friday July 03, 2020 @06:47PM (#23728288)
The wikipedia article has all the charts and formulas you need. https://en.wikipedia.org/wiki/Alcohol_by_volume

(To make the above solution 50% abv, btw, you need to keep adding water until it's 2 (liters, whatever) total volume.)

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Re:2+1=4, by quinoa by riffraff on Saturday July 04, 2020 @01:37AM (#23730380)
This is a common issue for people doing liquors at home: you mix 1l of alcohol which you used to extract some flavour with 1l of water and don't get back 2l.
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Re:2+1=4, by quinoa by tkeAmarktinClss on Friday July 03, 2020 @09:21PM (#23729190)
Thank you for being the best of HN.

The muderation might be awful, but the users are sharp.

Learned something new, and I'm a chem grad.

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