Silver Mirrors
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- Опубликовано: 16 дек 2012
- Beautiful reflective coating of silver plates out on the inside of flasks or glass ornaments. Redox reaction "mirrors" the way silver mirrors are actually produced!
This video is part of the Flinn Scientific Best Practices for Teaching Chemistry Video Series, a collection of over 125 hours of free professional development training for chemistry teachers - elearning.flinnsci.com
ATTENTION: This demonstration is intended for and should only be performed by certified science instructors in a safe laboratory/classroom setting.
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Although silvering was the method used for very large glass substrate reflecting telescope mirrors up until about 1935, in that year the largest telescope then in the world was equipped to do vacuum vapor deposition of aluminum. The silvering room built directly below the telescope is still there, where every six months the whole bottom of the telescope was lowered into it for the process. Now a greater effort is needed to remove the 4.5 ton glass mirror from that mount system, lower the glass all the way to ground level where the vacuum chamber is located, strip and clean the old aluminum and, under vacuum, flash the new surface onto it only once every two years. Interesting to see what chemistry was once used on that 100 inch(2.5M) mirror.
Thanks yours came out the best I've seen in RUclips so far
Right... well I've seen quite a few mirror silvering vids... but this is the 1st method which actually gave me a successful result..👍 👍 ❤️
Best video...I ve understood everything about Tollens reagent from here...
WOW! WHAT A GREAT TEACHER!!! Best video ever! Thanks!
Very nice video!
Hi there thanks for the great video! Does the silver deposit onto the parafilm when doing the Christmas ornament ?
thank you very much!! great video!! could you tell me the silver nitrate concentration? please :)
Could you have used the excess from the original flask to mirror the Christmas ornament?
Awesome video!! Where can I buy the chemicals to make my own art projects?
Please be my chemistry teacher~
this so cool
Used to do this in school chem lab!
Can this method of coating ,to make "mirror" finish ,to apply outside and on iron metal material?Or is only for glass and inside/behind
MONOTIS, inside, and it works on anything, the silver is *very* delicate
@@EdwardTriesToScience
Τhanks for your answer.
You would be the most informative tutor I,ve come across in 60years, but my problem is sonar. Who can replicate you in relation to sonar production
AWESOME
I know that it is an old video but maybe someone know...is it possible to make a telescope mirror and using of this methode ?
It is quite expensive and problematic to make it because it is just same places who can do this. What do you think ?
Is it possible ?
Dear Mem, can you please tell how to keep the mirror permanently? Thank you
how use this method by spray [ air compressor]
very nice thank you,can l use this solution for plastic instead of glass
No, this needs to be used with glass.
FlinnScientific can you drink from that mirrored flash?
How do I get to learn Chemistry from this lady?
Can you let me know the mass of dextrose, sodium hydroxide and silver nitrate?
Nurd rage says equal mass sodium hydroxide and silver nitrate and 4 times the amount of dextrose or sugar. ruclips.net/video/hUX_cpFWNso/видео.html
I used sodium hypochlorite (bleech not acid) to remove the deteriorating silvering from the inside of a mirror ball recently. Worked perfectly in 10 mins. No idea of the chemistry. Now I want to re silver the glass ball this video was helpful but getting all the chemicals may prove difficult :(
Excuse me, why we need NAOH ? What does it work ? I need some tutorial please. Thank you.
NaOH is to provide OH- ion. In reaction aldehyde is oxidized to corresponding carboxylate anion.
Thank you for this video. I am trying to replicate this experiment but I didn't get very nice results. I used the same method and same components though. Could you share the concentrations that you used? I think that might be my problem.
m.ruclips.net/video/y-4qqcCxD6g/видео.html
Does the sodium hydroxide need to be pure?
Impurities might effect mirror finish.
dose it happen without amonium nitrate
For the reaction to occur we need ammoniacal silver nitrate solution
Very dark silver layer is.
What is the resistance of that layer of silver?
Electric resistance? Chemical resistance?? Resistance can be many factors in this situation.
+THE UNKNOWN What is the electrical resistance. Sorry for being unclear.
so where is the platinum mirror and other precious metals
im trying making mirror but always not perfect always have white mist on that mirror.
It's important for the glass to be super clean and treated with deionized water. That's distilled water. Maybe that will get rid of the film. Good luck.
m.ruclips.net/video/y-4qqcCxD6g/видео.html
He tells how to prep your glass
@@joepublic5469 i think cleaning thats not the problem. i think i know what the problem. dont care u cleaning hundred times. that will be end with mist or cloud, except you use passivator. passivator can decrese the mist or cloud problem.
Hello
I'm chokri from Algeria I saw the video was good for me I benefited from it, thank you for choosing this video.
I have a query that I want to know about nickel chromium components and ratios of materials.
Saint louis
Halo Mam I work in silver nitrate.What is cyanide and its effect on the body?
cyanide is poison and it's deadly. Even in the seeds of some fruits it can leach out into the fruit and has killed people. One man died from the cyanide in plum seeds leaching into the fruit. He was a farmer and had eaten to many on a very hot day. Small amounts you can survive from however it will still make you sick.
What is silver ion?
Ryan Sitterly material wich in water (aqua) gives free charged atoms. In this experiment meaning silver nitrate.
+Ryan Sitterly Ag+
Where can I buy ammonia?
china taobao or local lab suppler
cleaning isle in supermarket
and how about tattoos made with precious metals
Freaking alchemy!
I tested a mirror. It was not silver. I think most mirrors have Al instead of Ag.
Yep.
Mirrors used to be silver. That is why only rich people owned them (poorer folks used polished tin). Modern ones use Al because we know the chemistry better.
... "because a mirror isn't a mirror unless it's silver, except when I say it is!"
10/10
donde puedo conplarlo y cunto cuesta
meoooow
😍😜🤪
need to know wether this is applicable in sugar balls
Cool vid, but as a chemistry student, it just hurts to see gloves being used so carelessly.
I hate chemistry
0:21 already bored