Hydrogen and Chlorine Reaction
ฝัง
- เผยแพร่เมื่อ 11 ก.ค. 2011
- Hydrogen and Chlorine react explosively to form Hydrogen Chloride. The reaction is started by shining a small ultraviolet LED onto the test tube. The cork at the end of the tube is propelled approximately 20 meters across the lecture hall.
Sorry about the sound and picture quality. English subtitles are available by selecting the "CC" button in the lower-right corner of the player window. You can also use TH-cam's "Interactive Transcript" feature to selectively read portions of what Daniel is saying.
For more details on this reaction please see the references below:
* Richard Schwenz and Lynn Geiger. "Photon-Initiated Hydrogen-Chlorine Reaction." Journal of Chemical Education 76.4 (1999): 470.
* Shakhashiri, Bassam Z. "Chemical Demonstrations: A Handbook for Teachers of Chemistry." Madison: The University of Wisconsin Press, 1983. (books.google.com/books?id=0rx6...)
WARNING: THIS IS A HAZARDOUS DEMONSTRATION
Like us on Facebook! / natscidemos
This also demostrate how light is quantized into different energy packets (photons) and that only photons of specific energy/wavelength/frequency can initiate the reaction.
you guys inspired me to do the same. but in a kitchen, without any lab glass, or lab material. just by using salt, water, carbon rods from old zink/carbon batteries an aquarium, piezo sparker(from a lighter) and an old mobile charger. I tried with the UV led, but no result. so I used the sparker, and for my surprise, it worked. indeed.
I know this is 9 years old, but I'm learning about halogens in my free time, and am blown away that negatively ionic charged chlorine is chloride and in our bodies LOL I'm glad we don't react to UV light like this 😂
So how do they carry this reaction on a industrial scale without blowing up the plant?
now make a cheap gun
hydrochloric gas!!!
@daiwilley I don't remember where we got these particular ones. I vaguely remember them being sold at the checkout at our local hardware store? I had good luck with searching for "colored led light keychain" and finding a set of 7 for less than $5 (not including shipping).
Interesting
I so gotta try this!
hi
in the link it says: 'perform the demonstration within 5 minutes of preparing the test tube', why is that so, what happens if you wait longer?
thanks
@jacksonpeter yeah, the camera Daniel used for the high-speed has a frustrating interface-he thought he set it up in focus when it obviously wasn't. The resolution isn't great at that frame rate either. Overall the quality is rough (bad sound, shaky camera, etc), but we decided to post it anyway. Thanks for watching!
So winded after such a short walk means you know he knows his stuff.
@sxuxnxnxy check out the google books link to Prof. Shakhashiri's writeup in the video's description section.
Great video - I will use to teach Chemistry (Bond energies and activation energy) and Physics photon energy.
@Tl82T I think Daniel found it in the checkout aisle of his local hardware store. You can order multicolored LEDs online for like $6.
Many thanks guys, keep up the good work,
cheers,
David Willey
(Mad Scientist for the Tonight show with Jay Leno)
seems like a fairly violent reaction, has anyone tried making a piston engine out using this? inject cl2/hydrogen mix and have infrared lights/lasers as the spark plugs?
Very cool. From where do you get the various colored LED flashlights?
Thank you!!!
@Extractables ok we changed it
good finding sir.. this may rings any bells