Electrolysis of Water Setup
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- เผยแพร่เมื่อ 23 ส.ค. 2024
- This is one simple way to perform electrolysis of water. You'll need a plastic tub, 2 test tubes, 3 large rubber bands, baking soda, duct tape, 9 volt battery and clip-on leads, and 2 sticks of graphite (or 2 pencils). Graphite can be obtained in an arts/crafts store (it's used for drawing). Or if you want to do it the hard way you can disassemble a 6 volt (lantern) battery. The hydrogen tube will fill up twice as fast (because each "broken" water molecule has 2 hydrogen atoms for each oxygen atom).
This is so much useful video for students like me who have got a vacation homework to make model on electrolysis of water and which our teachers have not explained how to make, this helped me a lot
Yes
Thanks- I'm glad you found it useful!
This is a wonderful video. I'm going to do this experiment with my homeschool chemistry classes to show them a decomposition chemical reaction. Thank you!
U r great!!! Awesome experiment with household materials (except test tubes)
thank you so much.in our school teacher just read definitions and they expect us to understand the concept by our own.thank you for explaining and showing us the experiment
This is a very easy video to show the process of electrolysis for students.Thank you to share this video with us.
Meijer brand baking soda. Represent!
Thank you for the easy to do experiment
Thank You. I'm off to do this with my 10 and 12 yr old ❤
Hats off to you my dear
Keep it up!
super video i was in confusion how to do electrolysis at home thanks for putting this video
Thnx it helped a lot dude in my school project
Really it's so nice video i will do the same for my chemistry class thank you ❤
Superb video and superb set up!!!its very easy....you have solved my problem. ...tysm😃😃😃
Thanks our model is working properly 👍👍😊
which tape it was and sir.... the wires were stainless steel alligator clips
How do u take the test tube out to test for the gas?
This is really late but I imagine you could seal the open end of the test tube while it is still partially filled with water, then you can take it out and you have some gas at the top.
ok thanks
Another question.....I did the experiment and i noticed that the colour of the Oxygen tube turns out yellow. Why is that?
KYNAIGEIROS490 thats chlorine gas, very dangerous to inhale.
@@amritlalsingh7780 how could it be chlorine gas? Where could it come from?
If you add too much salt it may happen
Nice experiment to show good
How can you identify which chemical is which?
Sir aapne vo Jo two rod. Use ki h vo iron ki h ya kisi another metal ki
Superb sir
great video, but why did you add baking soda to the water? Was it to see the bubbles of hydrogen and oxygen being produced?
thanks for the video. resourceful!
i have a question
This my teacher!
So which tube is hydrogen and which is oxygen?
Can we put the double sharpened pencils inside the test tube with on end connected to the alligator clip like yours?
But how to transfer this gas into a serigne??
did you have a voice playing on the right? my left headphone works, but not my right
help me please!
He didnt
A few questions: Do the stainless steel alligator clips corrode or break down after many uses with the baking soda/ water solution? Does the carbon rods break down after repeated use with the water/ solution?
When I used salt in the water, the clips would corrode completely after a couple of uses. Because of this (and the unwanted production of chlorine gas), I now use baking soda, and I've been using the same clips for several years now, although there is still some apparent corrosion.
Good this is so beautiful views
I like this video
really you represent a very easy way and nice
Believe that
Hello .
Is it possible to have hydrogen (electrolysis) from salt/sea water
(Only generally speaking)
under following conditions :
Input voltage 5 Volts DC Voltage.
Total resistance between electrodes in the sea salt water 0.1 Ohm
Important : There is resistor connected in series with resistance R = 4 Ohm.
So total resistance of the entire circuit is 4.1 Ohm.
The question is only general.
Really thank you a lot .
BR.
Stoyan.
Good
Why used graphite, can we used any other electric conductor
Does this reaction produce sodium hydroxide or lye like when using salt to make the water more conductive? I would think so since the sodium in baking soda would bond to the hydrogen and oxygen, but just wanted to check.
Tejas Maraliga chrloine gets dissolved in water and lye is produced. check out the sci guys on using salt water.
is this resource free to use for educational purposes? can you please provide the use criteria for this video, in the information section? also we would like to cite your work, could you share the citation of this work?
Sir can't we use a simple tape or red tape used in fitting the pipes reply me fast
Thank you
thanks ................. i used it in my fa project
Thankyou for the video...I intend to advise this video for my 11 year old kid for his science experiment. Just wondering if this is safe for kids to do by themselves as there is bit of Hydrogen involved..
Yes, I do this with my students in Science Club, ages 10-13. With a container the size of a test tube, the explosion is very small (in one of my other videos you can see students doing this). We find that you get the loudest "pop" by having only an inch or two of hydrogen in the test tube (which allows oxygen in the tube to easily mix in the reaction when you light it!) We have never had any problem doing this, and in fact most kids just hold the test tube in their hand (upside down) over the candle flame.
However, I would advise using baking soda as the electrolyte, rather than salt, as is commonly done. When using salt, the electrolysis produces a small amount of chlorine gas, which is better not to breathe!
@@jbiegun Thankyou for your reply ..Will proceed as suggested. Thanks again for the video..Keep posting
yo mr beigun i go to the school u teach at i dont have u tho but nice video
Guys somethink green comes up when i move + side on the incoming hydrogen from - side what is this i think its copper chloride or CuH im not sure but i can see that copper wire turns black btw i added salt
its awesome
How come some Electrolysis processes make sodium hypochlorite and other make HOCL. If I add vinegar to the salt and water does it produce HOCl and without the vinegar you get sodium hypochlorite?
Which one holds hydrogen and which holds oxygen?
Good day l have a doubt tha is what was the thing that connected with graphite
Otto Liau the one that connect to negative is the oxygen I think
aviz kurnia I have done this on much bigger scale hydrogen comes from negative oxygen from positive.
This video is just awesome....The same experiment is given in our class 10 ncert Science book also but I was wondering how to stabalise the test tubes and there was nothing bout baking soda there also it needed at least half hour to work.This video tell everything clearly but I still have a question,what was that thing connected to the wires which were holding the graphite sticks???Thanks for the help
Those were alligator clips
it is simple method but can you please tell me how to take out the tubes with H2 and O2 outside the water??
My students just lift the tubes straight up through the rubber bands and out of the water. Hydrogen is lighter than air, so it should stay in the tube as long as you hold the mouth of the tube downward. Still, the gas will eventually escape, so the students hold their hand over the mouth of the tube until they can put it over a candle and hear the hydrogen make a "POP!"
thank you so mush sir
Three more question, can the same container be used, without washing it out and starting over again, repeatedly by just adding water? Or, does both water and baking soda have to be added every time even if using the same container repeatedly? Is there another electrolytic chemical that can be added only 1 time, and only have to add water for continuous use?
I would replace the water. When you do this you will see a color change in the water, which indicates a chemical change. It's a small amount of water and baking soda, so from my perspective it would be silly not to just replace it each time.
can i know what is the objectives for this proj
To get rid of rust on tools
what was that wires that you plucked the graphite in... please answer me soon I have to make this and to submit it in the school
Hello sir, thanks for the video.
i wanted to ask if there is any alternative of the test tubes?
Hi Shreya. I'm glad you found this interesting. Test tubes are a simple way to collect the gas produced, but you could substitute any other similar narrow container as long as you have away to hold it in position. Sometimes I use small, narrow glass bottles, or you can get "soda bottle preforms", which are used to make 2-liter soda bottles. The preforms can be found online inexpensively, and won't break like test tubes if dropped.
Would carbon rods suffice in place if graphite?
And no, it's not a joke about how graphite is technically a "carbon rod"
+End Game we know tht
+Sai Likhit graphite is a form of carbon Ya know……
In the past I have taken apart a large 6 volt battery (such as for lanterns), and inside you can find 4 thick graphite rods. But wear rubber gloves to protect from chemicals, and watch the sharp edges after cutting into the battery!
+John Biegun ok but my question? I've done that plenty before my man.
This is very useful, I've been searching for a way to do this without car batteries or odd chemicals at hand. Thanks for posting this. Also, what is the ratio of water to baking soda used for this?
Christian Hartwig I premix a 5-gallon bucket with about a cup of baking soda so I have plenty of solution to dispense to my students all at once. I would think a teaspoon or two of baking soda in these little tubs would be plenty.
Alright, thanks! I plan on doing this project sometime this weekend. I appreciate it!
Should the wire be insulated
awesome
what if you don't have those fancy cables
Go buy them then lol
wire splice dude....or solder
consult with an electrician I also did that bro
What is the name of that wire ?? Can u tell me ?
great
cool
Congratulations John Biegun!!! Your video clarifies so many misconceptions students have!!! You also use easy to find and cheap to buy materilas and that's also cool!! My question is this: Instead of using a 9V battery, can i use an AC/DC Adapter 1.5V-12VDC ? Is it safe?
Thanks for your help. Keep making videos like the one above!!!
John Biegun can u expaliain how I get this battery
Just use a USB wall Adapter and a cut oft USB cable
Can you use salt?
Good day, please can I ask you, it was oxygen or hydrogen in the bottles. Sorry for my english but I am from Czech.
One container fills with hydrogen, and the other fills with oxygen. The one that has twice as much gas is the hydrogen (because H2O has two hydrogen atoms for each oxygen atom).
Yes, thank you.
Can you use epsom salt?
may i use a wire of double ended alligator clips or it won't work ?
Sure, that should be no problem.
Thanks alot... Appreciate it :)
how can i make the process faster?
more power! I did this and used 2 9-volts, worked a bit faster.
More surface area on the electrodes would work too
Which one is o2 and which one is hydrogen
The hydrogen collects in the + tube
@@pancakeguy9314 Actually, hydrogen collects in the - tube and oxygen in the + tube
why should we add baking soda
Adding any kind of salt helps the electricity to more easily pass through the water. Many people use regular table salt (sodium chloride) which works also, but it releases a bit of chlorine gas, which you may not want to breathe. The baking soda works fine for us.
thank you for your valuable information could you please how much should we would the ratio to water
mido amed the Hydrogen and oxygen ratio is 2:1. Thats why its H20. (2 molecules of Hydrogen and 1 molecule of Oxygen)
we dont understand why it is producing air
lol H2 and O are splitting and its not air wtf
nice
can we use salt instead of baking soda
yes you can
Ashish Rajput it will yield chlorine gas, be careful
Salt works, but you will smell chlorine, which can be harmful, so keep the area ventilated.
Why u need any of these? Cant I just use water?
Also what is the baking soda used for?
+SogMosee because pure water is not a very good conductor.
+Vineeth Prekar thx for telling me that! :)
me too
Vineeth Prekar So what exactly causes the conductivity to increase with the addition of baking soda? Can you explain what is occurring on the molecular and chemical level?
In solids you need free electrons ( or holes ) to conduct, In liquid electrolytes you need ions. when baking soda is dissolved in water it ionizes (although weakly) into sodium and hydroxide ions which moves towards their respective electrodes under a potential difference. This by definition is a current. The fact that conductivity changes is used in conductometric titration do read about it.
Does the water have to be distilled?
Could I use AC (alternating current) for this? I need more amperage.
***** I'll assume you are joking, but I always do have to warn my students that AC electricity and water are very dangerous together. Some kids do notice a bit of juice from these 9-volt batteries, and I use the larger 6-volt lantern batteries when I do this in a small aquarium, but I wouldn't go beyond that.
+John Biegun how can you tell the difference between alternating and direct current? And why is ac more dangerous?
AC is the electricity that comes from a wall outlet. It can electrocute you causing serious injury or death. I will not try to explain how electricity works as I'm not an expert and you can easily find that information elsewhere. Use a 9-volt battery for this experiment and you'll be safe.
what would i have to do if i wanted to collect big volume of oxygen at a faster rate? more power n how much per litre, if some guidance can be given. thanks in advance
This is not the way to collect a lot of oxygen. There are certainly better chemical reactions; probably something involving hydrogen peroxide, I would think. It easily breaks down into water and oxygen, which is why it is kept in a dark container to protect it from light. If you check out a video of the Elephant Toothpaste experiment you'll see the dramatic release of a lot of oxygen.
I have 3 questions. Will Magnesium Sulfate corrode the clips like salt does? Also, my science fair project tests whether electricity changes the pH level of water, so is it fine if I don't use the test tubes at all and just insert pH paper after awhile? And is it possible to use other batteries of different voltages, such 3V?
no
sogood
this is not electrolysis of water, this is electrolysis of sodium bi-carbonate solution! People are so naive!
@@vijayshukla8961 Indeed. And even if the Sodium Bicarbonate breaks down, it becomes Hydrogen, Oxygen, Sodium and Carbon. The Hydrogen and Oxygen end up collected whereas the tiny bits of Sodium and Carbon sinks as the density is greater than water. So adding Baking Powder helps not only to increase conductivity, but also increase the rate of electrolysis of water.