Electrolysis of Water
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- เผยแพร่เมื่อ 18 เม.ย. 2012
- Remember high school chemistry lab? You can do this at home: split water into hydrogen and oxygen!
Let me know if I should make this sort of video again (have an experiment in mind?Leave a comment!), and don't forget to SUBSCRIBE!
Very clever way to do electrolysis with little set up. I never thought to simply submerge the 9 V battery in the solution. Excellent idea!!
Never do electroalysis with this setup. You could short the battery. You should use allegator clips.
Agreed as a chemistry teacher.
This is fine for a quick lab. It only takes about 2 minutes to collect enough H2 to make a pop with a burning splint. I have used it several times in my middle and high school physical science class, reusing the batteries several times before they wear out - no dangerous short-outs. Plus, it allows for a great extension about the oxidation reaction happening with the chrome at the negative electrode, and the precipitate forming on the positive electrode. If you are really worried about it, there is a version where you encase the battery in waterproof modeling clay, with stainless steel bolts as electrodes extending out of the clay from the battery. It is a bit more messy and time intensive, so I use the raw battery. Your mileage may vary, but that has been my experience.
2H2O --> O2 + 2H2
is the stoichiometry:)
I did this quite a while ago with the same setup. Thanks for the refresh. Glad this was a simple demo wil do it in class tomorrow.
I'm Rick Harrison, and this is my pawn shop. I work here with my old man and my son, Big Hoss. Everything in here has a story and a price. One thing I've learned after 21 years - you never know WHAT is gonna come through that door.
Great demonstration. My daughter will be doing a science project on this very soon. Where we can we find those test tubes to fit over the battery terminals ???
well just one quick question! how to store that hydrogen and fill it in a shell
Nicely done!!! I'm a new fan of yours!
Its not recommended to use any thing with Chloride to speed up the solution such as Salt because it causes chloride gas to be formed, which is poisonous.
oh
no I used salt
Safeer Ahmad Khalid its probably only small amounts but be careful
How long it take to kill someone
depends, if your outside doing it, it should be OK.
I would recommend reacting Chlorine with another compound / element to stabilise it.
Reaction is as follows...
2NaCl + 2H2O --> 2NaOH + H2 + Cl2
This happens due to the shear reactivity of Sodium,
It reacts with the water producing Sodium Hydroxide,
I believe this is also an irritant so be careful.
use a fume cupboard
Thanks so much. This has helped me with my Science Fair project :)
Excellent !! Keep on adding such videos
We can add sulphuric acid
It,s very interesting. Ilike it.
wont the positive lead erode? thats what happened when i directly put coppers wires into the water
If you had pure water and the battery was sealed properly, you wouldn't have gotten any bubbles
Your voice is fabulous, amazing,Too good😀😀
Thanks for sharing! Needed a simple experiment for my 7 y/o son and this should fit the bill quite nicely.
Sooo hes 14 now?
I find the idea of dropping the battery into the solution and then using the flat surface of the 9V to support the test tubes pretty ingenious. Did it work? Yes! Thus an effective hack. This is science, so fear or judgment are only obstacles to discovery. Good job young man.
wow cool! i like it! but why did you mix acid and magnisiumsulphate in it? kk nice!
Hi...Can the battery be resused to test it with different solutions of water eg. with soda, lemon etc if its submerged into water?
thanks for the video, now i have the ideal to do my lab
Thanks a bunch, Robert!
Very good experiment.thank you for making this video
Loved it! Thank you :)
Thanks for uploading this video it works and your explanation was good
it will work as long as the water is not pure(distilled), there can be any impurity in it
I thought you were never supposed to put a battery in water
super cool, thanks for making it so easy to understand. I will be able to explain to my 5th graders with more depth.
Thank you so much because im doing the same expirament for science fair and i really didnt know how to do
What about using baking soda instead?
REALLY COOL.
An interesting video, thank you!
awsome, thanks for making it so easy to understand. I will be able to explain to my 5th graders.
i wish i could save it and watch it later offline
can u pls tell me another method which we can use dispovan srinch instead of testtubes ???
This was very simple way to do, it was cool....
great work dude
I love it it’s an amazing video.
putting battery in water, not safe right?
Great work dud :)
The best, thanks.
+ and - have nothing to do with hydrogen or oxygen separation ratio. the - terminal is doing all the work
it will work only with salt right ?
bravo man,can i do this with a 9 v battery charger,please give me an answer fast becouse my tomatos are dying (bugs hate electrolyte water)
good , simple and effect
Good Video.
Good Explanation
thanks so much!
when i put salt in water and conducted that experiment, the water became somewhat bluish green and i don't know what was that
Älex, did you use copper electrodes? If not, you may have copper in your water source. That is a classic copper-oxygen reaction there.
it was amazing!!! i love it....
Can I use regular table salt to increase conductivity instead of that substance you used?
This is SUPER late, but yes/no. Yes it w'ill work, but no, you should not use it. Why? Because it will make chlorine gas, which is deadly. Granted, it will be a very small amount, but better same that sorry.
very nice video
superb dude..
awesome
:-)
Thanks dude
Thanks u really helped on my science far
Adding sulfuric acid to water will also do.
tell abt the habers process!
related to @mmonia
Simple but effective
i love that
You Rock!!!
Table name
Would there be any way to measure how much energy you used to convert one mole of water that you guys know of?
I believe you could use a voltage-current detector to see how much power you are using. However, you would need a different power source such as a solar panel for the wiring. In that way you can see how much power it takes to convert a millileter of water. I don't know how to do it with a mole though
Similarly, I ask the question: is there any way to find how many moles of hydrogen it takes to produce a joule of energy (in a hydrogen fuel cell setup)? I cannot put the hydrogen at STP and i dont have the resources to measure the hydrogen's temperature.
Hi Robert nice experiment, it would be better if you had proved the presence of hydrogen gas in tubes by placing a fire at the opening of tube. Any way nice one
v good bro
i am interested in electrlolyzing water for cleaning instead of using chemicals. can you demonstrate a video on how to electrlyze water for cleaning purposes? or show that it works like using microbiology? maybe show how to build this unit at home DIY? what happens to the electrolyzed water (acid/base) after used? does it go back to h20?
Isn't it NaOH anyway?
Looking it up. You need apparatus. It is probably cheaper to buy than make.
so cute
tq soo much
Coooooool😎
Superb way nice and easy
Can you use still water with sodium chloride with a 9 volt battery and get the same results?
no as the sodium chloride solution split into hydrogen and chlorine
chlorine is a poisonous and dangerous yellow gas even if you want to do it,
do it in fume hood
+Forace Kryr This is true^
You helped me and my daughter with a sience project
Hi, how did the science project go? I realise it was a long time ago.
That's good.try other substances like sulphuric acid
grt work done (y)
how can I get the magnesium sulphate?
Amazon?Or you could try adding sulfuric acid to magnesium.
a cloudy gas formed at the bottom of my flask any1 know wjat it might be and yellow flakes are floating to the surface
theres only 3 element i can possible think could react H2 O2 Fe and CL2
If you are using MgSO4, it could be the sulfate (SO4). If you are using table salt, it may be chlorine gas. I don't know for sure though.
Used copper?
water after electrolysis is it called D2O??
+SAMEER AHMAD if you had only 1/7000th of the original water left then it is mostly D2O.
Uhhh is it safe that we put the battery inside the solution???
short term, yes, but it does corrode the electrodes. I do not recommend using the battery for anything else later.
damn this fking thing beats my jumping sodium
Interesting science but
1) I'd recommend ppl to not do this at home; if water seeps into the interior of a poorly manufactured battery, there can be mixing of chemicals inside the battery that generates lots of heat
2) the ratio of H2 to O2 collected is clearly > 2 : 1, because the oxygen can potentially react with the iron/steel cap to make Fe2+ (or Fe3+) ions. @ 2:25ish you can see that the solution in the left test tube does not have the same clarity / color as the right hand side, possibly due to the palely-colored Fe2+
helped a lot in stduy thanks
gud experiment. but use electrodes, then it will do better
nice vedio
That's hydrogen on anode, and chlorine at cathode not oxygen
Its dam gud ossmmm
That's not entirely true about water not conducting electricity.
ANYTHING will conduct electricity with enough voltage and a high enough amperage on the load.
down to the atomic level there is no voltage or amps
Daniel Kuzko
Not completely true by my understanding but that's not really useful information unless you work in nanotech.
I mean like each individual electron I believe don't really have amps or voltage cuz that measure with many electrons sooooo yea, that is pretty deep stuff if you think about it
KawallaBair
just about anything will allow electricity to pass through it. However some materials do it better than others. This is due to something called the band gap. The bigger the band gap the harder it is for electrons to jump across it. when someone says something does not conduct electricity they do not actually mean it does not allow electricity to pass at all; It means it is not a conductor (a material with a small but non zero band gap). Pure water has a big band gap thus is not a good conductor.
Wulframm Rolf
To be honest, I don't contest that, I work as an Electrical designer. Water is actually a very good conductor (Though unstable) due to it's impurities. I'm pleased you specified the high band gap of pure water however, my comment applies to both. High enough voltages are able to tackle higher impedences, so I can't help but feel that you're explaining to someone who already agrees with you. I'm still happy with the comment though, it helps to educate others who come to this video :).
Can I electrolysis of water to D2O/Heavy water?
+Mamun Mama No
+tom ziferTomZifer Of course we can.However,the problem is where does the D2O come from lol
+decentgamer2 -I have 50 gallons of D2O in my basement. So that's where it can come from.
+Taylor Rogers the internet
I cant focus because the way he used to explain is really funny
did he really just drop a batterie in water no offence i feel like he searched this and said im snnd
your equation for the hydroloysis is wrong, its 2H2 + O2= 2H2O
Did you pull that equation out of your arse?
No, I just happened to know it and noticed it was incorrect. I was a member of the chemical olympiad, so I had to know lots of equations like that. I didnt mean to seem like I was pulling the equation out of my arse. I'm soooo sorry my knowledge is physically insulting to you.
Tom Whiteley His equation for the electrolysis of water is correct, but not balanced
2 H2O(l) → 2 H2(g) + O2(g)
😀😀😀
It seems like you have more than twice the amount of hydrogen than oxygen. Could something else be at play here?? Oxygen dissolving or forming soluble compuonds with the MgSo4? Just an observation, also my own observation doing this experiment too. Nice video. Simple and clear!
yea some bass (lol see what I did there) and other weird stuff
im pretty sure in this case the surface area of the conductor is at play here, if the anode and cathode were the same shape then they would produce a 2:1 ratio
shelvacu It always has to be a 2:1 ratio of hydrogen to oxygen. Every water molecule split into individual atoms produces two hydrogen atoms and one oxygen atom, no matter the shape of the anode and cathode.
Why do you say the definition of electrolysis is the splitting of water into its components?
Aren't you saying that all atoms are the same size by saying the more volume gas is H2 and the less volume gas is O1?......
the difference in size of the atoms isnt important here. if u look at the ideal gas law, pV=nRT u will find that the valum is related to pressur moles and temperature not the atomic mass.
+kamau thompson - yeah duh. everyone knows that. WTF... get a degree dumb ass
All gasses occupy 22.4L/mol at STP. Read a book.
Well bow I'm sad... that wasn't nice
*now
U talked too much more than work
But helped me
Burn it
Isn't this the guy from The Good Doctor
I fucking loved this!!!
How dare you only be 3 minutes
Will you marry me☺☺
drug store ( ͡° ͜ʖ ͡°)
you look funny😆😆
shut up
smg
great video. this is the simplest demo of electrolysis on youtube. are you gay?