OK, you want to make some hydrogen? Let's start with one of the most basic cells that anyone can make right now at home. Go grab the following items:
- A small battery, a 9 volt cell will work best but even a AAA battery will work for this little demonstration.
- 2 metal paper clips
- A small cup or bowl filled with TAP water (not filtered water)
- Some salt (WARNING!!! -ONLY use salt for this small scale demonstration. Use of salt in larger units will create TOXIC GAS that is very dangerous to breathe!!! -It is also very caustic to the metal surfaces in your cells.) Why the salt you ask? Well you see salt, when mixed into water, becomes an electrolyte. An electrolyte improves the ability of the water to carry the current and thereby improves the electrolytic reaction (electrolysis). By adding just a small amount of salt to our water, we should see an increase in gas production.
Try it now and see if you can detect more production. It may be difficult to see on this small scale. Remember the salt gives off a toxic gas, so never do this on a larger scale! OK back to the Usable part. For this part of the experiment you'll need 2 more items:
-Some dish washing liquid
-A lighter... preferably one with a long tip like you'd use to light a grill
Now that you're producing more gas due to increasing the electrolyte levels in the water, you're going to see just how powerful this stuff really is!
Put a drop or two of dish washing liquid in the water and then start the electrolytic reaction again. The bubbles will collect on the surface of the water due to the dish washing liquid. You can gather them up with your finger or with a pencil or spoon, just try to get some into a small clump. Start small.
Now light the clump with your lighter! And witness the power of a stoichiometric ratio of Hydrogen and Oxygen gas instantly combusting. Basically you're turning the gasses back into water though the combustion process. That big word, stoichiometric, just means: in the exact amounts you need them to be in to fully react with one another.
In other words, it's makes a really loud BANG for such a small amount of gas. OK you'll probably want to play with this for the next hour or two -I know I still enjoy the exploding soap bubbles every time I see them!
NOTE: If you want to get a bang or pop of any value with soap bubbles, you will probably need a larger setup than just 2 paper-clips. This is because the soap bubbles are so thin that the hydrogen passes through them in about 30 seconds. So the production rate is not the problem, but rather the thing you're using to contain the gasses (namely the soap bubbles). Now since it would be difficult to properly contain the small amount of gas that you're making, the easy answer here is simply to make more gas FASTER!
As proof that what I am saying is correct, just look at my "Double Barrel Hydrogen Squirt Gun" project. You will see that it uses nothing more than 2 small wires to generate the gasses required for a very effective display http://oupower.com/index.php?dir=_My_Projects/_Some_Educational_and_Fun_Stuff/The_Double_Barrel_Hydrogen_Squirt_Gun. It takes that little device sometimes 6 or 7 minutes to generate a pea sized bubble of hydrogen & oxygen. The trick here is that it can't escape easily so the duration of production is not a problem in that case.
If you come up with a simple yet effective method of safely giving more production so that people can do the "soap bubbles" test, please e-mail me and I'll post your addition to this text.
... (time goes by so quickly when you're having fun! ) ... All done playing? Cool, let's look how you can improve your cell now. |
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