There is a device called Fizz-Keeper, which allows the user to pump compressed air into soda bottles, thereby allegedly “preserving the fizz”. I am curious about this item’s effectiveness.
A recent thread discussed this issue; I would like further details.
(1) There are anecdotal accounts (including my own) that the fizz-keeper does indeed work. It is not necessary to add further casual observations. (I will not object if someone wants to bump this thread from page 3 though. )
(1a) Going beyond mere impressionism, if somebody wanted to test one of these devices, how would the fizziness be measured? Could it be measured using ordinary household items?
(2) The aforementioned thread and this website suggests that the Fizz-keeper should not work, since “the escaping gas can be pushed back into the liquid only by forcing more molecules of that particular gas (in this case carbon dioxide) into the space above the liquid.”
(2a): Just to clarify: if you pumped pure oxygen at 100 atmospheres into a soda bottle’s headspace, this would have no effect on the liquid’s long run ability to carry CO2, right?
(2c): I understand that the amount of CO2 in ordinary air is inconsequential.
(3) The Journal of Chemical Education (Howald, Reed. The Fizz Keeper, a Case Study in Chemical Education, Equilibrium, and Kinetics J. Chem. Educ. 1999 76 208. ) claims the following:
I’d like a little elaboration on this point. Does “hours” mean 2 hours, 48 hours or what? No WAGs needed. And why the heck would the kinetics be affected? (And what does that mean anyway?) http://jchemed.chem.wisc.edu/Journal/Issues/1999/Feb/abs208.html
(3a) Regarding kinetics, how many times should the Fizz-keeper be pumped?
(4) Bonus question: Why is CO2 used to make soda fizzy, rather than any other gas? (Hmmm. Helium might be diverting.)
To summarize, I want to know whether the Fizz-keeper really works, and I want the answer to be scientific, Gaad dang it.
Disclaimer: I lack a background in chemistry or physics, so I won’t be able to moderate this thread very well.