Specialty Chemistry Forums > Citizen Chemist
Ingredients needed to pressurize a empty bottle
EDsteve:
Hello dear forum,
to be honest i am a electronic guy and my chemical skills aren't even enough to know in which sub forum my question should be in.
I am not sure for what to google. So maybe my question is answered already a 1000 times. Please be nice to me :D
Problem:
I am building a floating peer from empty water bottles. But as deeper the bottles go into the water as more compressed they get and loose buoyancy. Also waves will compress them in time as well nobody wants to hear the crackle sound when they deform all the time.
Solution:
Put pressure inside the bottles. I thought about several methods already:
1. before closing the bottles, put them in ice cold water for a few seconds. Result: works great, but i prefer to have higher pressure inside.
2. Put a small portion dry ice inside. Result: Would be perfect i guess. But I live on Sumatra in the jungle. Dry ice is way to far away.
3. Let a small fire cracker explode inside after the cap is closed. -> Still looking for firecrackers to try it. Sounds funny. But can work right?
Now i started thinking about baking soda and vinegar or any other house hold ingredient. Fermentation? But my knowledge is almost zero about these things. There will be thousands of bottles. So it should not be too expensive. And of course efficient. So a small amount should lead to a big volume of gas.
I should get most common chemicals cheap online. Sooo. Give me something to try and i will do :)
Regards
ED
billnotgatez:
I am seeing visions of exploding or imploding bottles.
Scary to me.
Setting aside how workable this idea is.
What is the stress level of these bottles and how are you going to be sure you do not exceed it.
EDsteve:
I will start small and add more if pressure not enough. So i can be almost be certain not to exceed the limit. When pressure high enough i know the right amount of the "ingredient" to put inside and the mass production can begin :)
And of course testing must be done behind a wall.
A soda bottle can hold minimum 150PSI or 10 Bar. There are many youtube videos out there who demonstrate that. I just made a quick test and jumped a few times on one of the bottles i have (not Soda). But they seems strong enough too. No crack.
Two Bar should be enough for my project.
Any idea?
Borek:
--- Quote from: billnotgatez on April 24, 2020, 10:18:43 AM ---What is the stress level of these bottles and how are you going to be sure you do not exceed it.
--- End quote ---
Carbonated drinks go up to 50 psi, quite a pressure.
EDsteve:
Yes. They do. Coca Cola bottles for example are tested to withstand 150 PSI. And the stronger ones even 250PSI.
Is my question so difficult?
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