Jokari Fizz-Keeper Pump Cap

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Brian Rohrig (1999). 39 Fantastic Experiments with the Fizz-Keeper. Tallmadge, OH: Creative Chemistry Concepts.

Research into the Fizz-Keeper's mechanisms and processes has shown that the Fizz-Keeper, let alone pressurizing a soda bottle, does not actually prevent loss of carbonation, with its marketed claims being dismissed as pseudoscience. [1] [2] Description [ edit ] Several styles of device exist, from the plain piston pump to devices incorporating a bulb and a latch and hinge device to allow liquid to be poured out of a spout without removing the Fizz-Keeper from the bottle. [2] Research [ edit ]I’m not sure how that would work. The problem with the pop going flat is that every time you open the cap to pour some out, the CO₂ above the liquid escapes and is replaced by air and then, after you replace the cap, more CO₂ comes out of solution to replace it. So to keep that from happening, you’d like to find a way to pour out the liquid without losing the CO₂ gas. One way to do this might be to have a cap with a valve in it you could open to pour the liquid. To fill your glass, you’d invert the bottle, open the valve, and then squeeze the bottle to dispense the liquid. When you inverted the bottle, the CO₂ would go to the top, and since you were squeezing the bottle, no air would enter. (These bottles are made from polyethylene terephthalate (PET), which is very flexible, so squeezing should be no problem.) A Fizz-Keeper is a type of closure that is marketed as a way to keep carbonation in soft drinks. It consists of a small round hand pump that is screwed onto the top of a plastic soft drink bottle, which is then used to pump air into the bottle, preventing the drink from going flat. [1] [2] [3] [4] where S_{\rm gas} is the concentration of gas in the liquid, K is the Henry’s law constant for the solubility of that specific gas and liquid pair, and P_{\rm gas} is the partial pressure of the gas above the liquid. Hence, it doesn’t matter what the pressure of the nitrogen and oxygen pumped into the bottle may be, the carbon dioxide dissolved in the pop will continue to come out of solution until the partial pressure of CO₂ in the gas rises to the equilibrium point with that dissolved in the liquid.

a b c d Brian Rohrig (February 2002). "The Fizz-Keeper: Does It Really Keep the Fizz?" (PDF). ChemMatters: 11–13. Archived from the original (PDF) on 2012-03-06 . Retrieved 2009-05-16. Students can plan and conduct an investigation to compare the effects of different strengths or different directions of pushes and pulls on the motion of an object by changing the number of pumps on the Fizz-Keeper Bottle Pump. The solubility K of different gases in water (which I’ll assume is the same as the liquid in the bottle) varies widely, so the behaviour of the gases involved is very different. Here is the solubility of the three main gases we’re dealing with here, all for 5° C, the temperature of a typical refrigerator, and all in units of grams of gas per kilogram of water. USpatent 4,524,877,Willard A. Saxby and Robert D. Pikula,"Pressurizing and closure apparatus for carbonated beverage containers",issued 1985-06-25The Fizz-Keeper Bottle Pump using in conjunction with a water-filled soda bottle and pipet, allows students to pump pressure into the bottle to observe and understand the effects of balanced and unbalanced forces on the motion of the pipet. By using the Fizz-Keeper Bottle Pump (in conjunction with a water-filled soda bottle and pipet), students can plan and conduct an investigation to provide evidence of the effects of balanced and unbalanced forces on the motion of an object. The first Fizz-Keeper-like device was patented in 1926 by G. Staunton. T.R. Robinson and M.B. Beyer patented the Fizz-Keeper itself in 1988, without claiming in the patent that the device maintained a soft drink's carbonation. [2]

This product will support your students' understanding of the Next Generation Science Standards (NGSS)*, as shown in the table below. By using the Fizz-Keeper Bottle Pump (in conjunction with a water-filled soda bottle and pipet), students can plan an investigation to provide evidence that the change in an object's motion depends on the sum of the forces on the object and the mass of the object. a b c Joseph A. Schwarcz (2004). "How does a Fizz Keeper keep the fizz in soft drinks?". Dr. Joe & What You Didn't Know. ECW Press. p.24. ISBN 9781550225778. Mark Talmage Graham (March 2002). "Investigating gases' masses in impecunious classes". The Physics Teacher. 40 (3): 144–147. Bibcode: 2002PhTea..40..144T. doi: 10.1119/1.1466546.This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.