NurdRage - 2015-04-18
In this video we make a chemical solution that changes color when exposed to air and reverses when sealed away from air. In a vial about 20 mL in volume. Add 200 mg of copper chloride, 10 mL of hydrochloric acid (20% or higher in concentration) and 2 g copper metal. Seal the vial and let it sit overnight. It helps to include a stir bar and stir the solution overnight. What's happening is the copper metal is reacting with the copper (II) chloride in solution to produce copper (I) chloride. This reaction is called comproportionation where the same substance in two different oxidation states react to form a single substance of intermediate oxidation. Eventually the solution will go clear as all the copper (II) ions are converted to colorless copper (I) chloride. To observe the air sensitive reaction, simply open the cap and let the solution sit on air. Oxygen in the air will react with the copper (I) ions to convert them to copper (II) ions which are green in hydrochloric acid.
I have a few more copper videos planned in the coming weeks.
@***** >being this racist
+NurdRage could you please make a video on making ammonium permanganate . i am a big fan of your and keep up the good job.
have you ever used hydrofluric acid?
What kind of copper cloride 1 or 2
Is there anything that can be added to increase the rate of diffusion?
As in, assist the transport of oxygen down into the solution without stirring, bubbling or otherwise agitating?
NurdRage notification pops up, and my Saturday is instantly better.
@***** Its Saturday in the US?
"Air is cheap" he says...all this time i thought it was free...
Air is cheap just as WiFi without a password is cheap. They are actually free, but you need to spend some money to really make use of them, i.e. laptop or smartphone in the case of WiFi. In the case of air you have to pay with your life... damn.
Air costs 25 cents for five minutes of it at a gas station when you need to fill your tire.
It costs money to keep it clean. E.g., it took all our non-essential businesses closing before we could see the mountain ranges in our area, so it cost many people their livelihoods.
Very cool. That's "going green" in more ways than on.
I use copper chloride everyday with my gold recovery from e-scrap and knew about this characteristic with the presence/absence of oxygen but I didn't know the solution would ever go completely colorless.
This is so interesting, thanks for sharing
Hi! quick question: does the mixture really have to be constantly stirred overnight, or can the reaction still take place even if only a small amount of stirring occurs.
Hi Nurdrage!
Fist of all, thank you for your all educational videos that i found them interesting.
I am wondering to know, What are the full Equations including any by products if existed for this experiment. The way I came up with it there is hydrogen by product in first reaction and chlorine in the other. Is that right?
Yet another absolutely fantastic video!
I love your videos @NurdRage you inspired me to do chemistry
What would it look like when a strong oxidant is added, like a drop of Hydrogen Peroxide?
Great vids my man! Love all the great content...been subscribed for a while now!
I used to use this method to etch my circuit boards, you can make it by mixing hydrogen peroxide and hydrochloric acid and a penny, I had okay results without agitation. much better than having to dump ferric chloride, just open to air recap and shake a bit to recharge. I kept the concentration quite low and it worked well.
wow, great experiment, i kept wondering what was stirring out there, lol, is it remotely controlled ?
Good video. When I saw the title I figured however you were going prepare the air sensitive solution you would do so without using a vacuum. As to how is what intrigued me.
Holy wow, that's interesting!
Can you do a video covering the steps to turn copper chloride to copper sulfate?
I rely on this reaction for etching circuit boards.
I miss the old intro with the sparklies and sound.
When this solution is added to a large amount of water (about 500 mL) containing a few grams of sodium sulfite, copper(I) chloride is formed, which is insoluble and can be filtered off, even though it will oxidize a little bit.
Would be cool to make a video on Cyanuric acid... By the way, great work!
+NurdRage when will you do a video on making potassium chlorate by electrolysis KCl?
Some gas sensitive gels would be useful for making sensors that detect harmful substances like carbon monoxide or methane. I would appreciate it if you made a video to show how they are made.
The statement "Air is cheap" amused me.
Revegelance
That depends on where un the solar system you currently are.
nurdrage has a specialisation in copper. im calling it
Nerd rage! Separate zirconium from deodorant!!!! Then use it to coat an penny or something! big fan of electrolytic disposition over here! been watching since you started! Let's see if zirconium is good for Cathodic protection.
Make more often vids ur great
I'm so glad you've come back to youtube! I have a question. Why does hydrogen peroxide cause hydrochloric acid or sulfuric acid to dissolve copper and silver more readily? I understand that hydrogen peroxide is an oxidizing agent, but I don't understand why that changes what an acid can react with.
Do you have a preferable site that you order your chemicals from or do you have other means of obtaining such items?
Wow, i really want one of those mixers
Where did you get your education as a chemist, and how long did it take you to earn the degree?
Where can I get these stir bars from?
That's so cool!
0:08 in and out already changed colour so dramatically that even glass have disappeared
what are the gloves that you use to record your videos?
You should make a video of how to make thermal dust,thermal dust has soo many uses and i think it would be a good idea. Lv ur videos!
You make the best videos.
I feel like the people asking you to change have not been with your channel from the beginning. Just keep doing what your doing.
So, was the non-liquid component of the bottle a vacuum at 1:50?
"Air is cheap and environmentally friendlier for obvious reasons" lol
There is already a solution that changes color when exposed to air, it's called soup. I wouldn't recommend it though, you waste food and it takes a long time.
can the same reaction be done without stirring?
Don't understand any of this stuff yet I yearn to see more, why?
You should fill a ballpoint with this
So cool!
You may try putting either the factor which you speed the video up or maybe a clock on the original video and then speeding it up. I feel like it would at least help me grasp the lengths of the experiments better.
Long ago I saw a guy who came up with a mixture that changes through several colours in sequence and just keeps on going for ages. Do you know how it's done?
@Christie Nel I remember that too from high school. Mine was a solution that changed like a stoplight, red yellow green. It went for a pretty long time if i recall correctly.
@Christie Nel iodine clock
or any "clock reactions"
@Christie Nel There is one called the traffic light reaction that Periodic Videos did. It started a dark green/blue then went to red, then to yellow. If you shook or poured it, it would react with oxygen in the air, returning to red for a second, before returning to yellow.
@Christie Nel what leth said is a decent clock reaction but I think you mean the dilluted potassium permanganate and sugar in a slightly alkaline solution.
@Christie Nel A well known one for example is the Belousov-Zhabotinsky reaction that uses KBr and Ce(SO4)2 among other things. You can find it on Wikipedia. Did that one myself a while ago at Uni and it's absolutely mesmerizing to watch!
great video nurdrage
I'm sure I'm not the only one who would enjoy a video on were you get some of your chemicals... such as Nitric, sulfuric, and hydrochloric acid. Potassium thiocyanate, and others. We know you can make some of those, but the yield is poor, so it's better to purchase them. Also, a video on were you got your equipment,(such as your fume hood) would be cool
Would this work if I used a solution of ammonia instead? The relevant complex ions seem to be soluble.
Michał Hickiewicz - 2015-04-18
Hey, maybe you should consider putting a analog clock next to your experiments if you're going to speed the video up. That'd give us the idea of how fast is the reaction really happening.
Great channel, BTW. Keep up the good work.
chu Harry - 2018-01-22
Yay
Laharl Krichevskoy - 2018-04-02
This one takes a few hours. Its rather slow
ReactiveChem - 2019-10-28
For me, I sealed it in an Ampoule and if shaken, it only takes about 20-30 mins to fully convert.