Separate Hydrogen and Oxygen from Water Through Electrolysis


Step 3: Water and Salt

Picture of Water and Salt
Water alone is not a very good conductor. You need to add some sort of electrolyte. Regular old table salt works fine. Add as much as will dissolve into the water, and don't worry about it if there is some sitting on the bottom, it really doesn't matter. Pour this salt/water solution into your med. container, and also fill your 1 or 2 gas collecting containers
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magesing2 years ago
Note: if you use NaCl (table salt) as your electrolyte, you will make more Cl2 (chlorine gas) then O2 (oxygen gas). If you are trying to make oxygen, this is not the correct choice of electrolyte. also node, you do NOT want to breath in chlorine gas.
mDey4 years ago

I'm doing this as a science project - can I do this with SEAWATER?
benmerrill6 years ago
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Chlorine, nasty as it is, isn't mustard gas. That's a different (and deadlier) beastie, a class of organic sulfides that were used as chemical warfare agents in WWI. It's still not a good idea to electrolyze sodium chloride, unless you want chlorine and chlorine compounds. Sodium bicarbonate is just as easy to come by, and yields hydrogen and oxygen.
wyle is corect baking soda or sodium bicarbonate is much easier on you as well as easier to mix with the water being that its finer particles require less mixing and as far as the mustard gas thing goes Sulfur mustard is the organic compound described with the formula (ClCH2CH2)2S. In the Depretz method, mustard gas is synthesized by treating sulfur dichloride with ethylene whit sulfur being the main and most important part has no part in this little experiment neither does ethylene so there are no adverse affects to using salt but i would still use baking soda as it produces hydrogen with water
You might want to check your facts... Chlorine =! Mustard Gas.