Make Terbium Nitrate, a Green Fluorescent Compound
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Discussion
- What do you think about this? see, and tell us now.
- You need a specific ligand like antipyrine or dipicolinic acid to allow for fluorescence in solution. Also, the solution must be absolutely free of ferric ions.
- That's possible, I hadn't thought of that! Based on the reaction rate of the last few pieces, I used just the right amount of acid so I don't think much had decomposed. Of course, I could have added too much acid and the decomposition then fixed it for me :)
- Nice video.
- isnt terbium sulfate also a brightly fluorescent green under uv light?
- I forgot to say that It was a nice video!
- Look for zinc reaction with nitric acid, you will find that ammonium nitrate is formed, from some of my books(I will U2U soon on SM) reactive metals reduce nitric acid to ammonia and metals oxide then the ammonia react with the nitric acid to make ammonium nitrate and finaly the oxide react with the nitric acid to make water and the metal nitrate.
- For concentrated acid, NO2 will form, dilute acid gives NO, only very very dilute acid will produce H2, using conc. acid H2 gas produced is negligible ....
- kewl vids
- Nice video!
- I hear that water often suppresses fluorescence, which would explain why the solution didn't fluoresce.
- A mix of few reaction is probably happening: FAVORABLE: Tb + 6HNO3 -) Tb(NO3)3 + 3NO2 + 3H2O With concentrated nitric acid this is only a small part of the reaction: 2Tb + 6HNO3 -) 3H2 + 2Tb(NO3)3 With concentrated nitric acid this is only a small part of the reaction: 2Tb + 8HNO3 -) 2Tb(NO3)3 + 2NO + 4H2O favorable with reactive metal like terbium concentrated nitric acid: 8Tb + 30HNO3 -) 8Tb(NO3)3 + 3NH4NO3 + 9H2O Hope this help!
- That would have worked too, sure, I just didn't think of it at the time. Adding water to the test tube also slows the reaction down a bit by diluting the acid.
- Does it glow like that while in solution?
- Haha thanks. It would be super cool if you could supercool it under uv light, then set it off. Fluorescence is awesome :)
- Thanks for all the info! Do you have a reference on your last equation? I've never heard of nitric acid rearranging itself into ammonium nitrate like that.
- Oh I'm afraid that's top secret :) I'll let everyone know how it turned out once I get the last chemical I need to perform it.
- Do you think this would work with terbium (III) oxide as well?
- Great video! At first I thought the disclaimer was gonna be the usual 'don't try this at home' but I was glad it wasn't, instead a testament to the love of science :)
- No, it doesn't The fluorescence must have something to do with the crystal structure itself. Good question!
- Excellent video. I'd be glad to see more channels move towards this format, rather than the academic demonstration of a well-studied procedure. Fact is, most chemistry worth doing has never been done before, and it's that feeling of doing something new and playing it by ear that is really enjoyable for me.
- hello?
- Thank you!
- Wow, this is quite fluorescent! Looking forward to seeing what you plan to do wit hit, even if it doesn't work.
- Hey thanks a lot, I really appreciate that! This was definitely a really fun experiment because I didn't know how things would go. Glad you liked it, I'm always worried I'll start to bore people with my long-winded explanations :)
- Where'd you get that wash bottle at 6:36?
- How did you know that it wasn't just the heat that caused the nitric acid to decompose into the NOx? Really awesome video though, it really is the small things that are sometimes the more enjoyable! :D
- Looks like I should get some terbium!
- why didnt you use an ice/cold water bath instead of just adding water?
- What is this experiment that you have in mind involving the terbium nitrate?
- I would think so - that should be soluble in nitric acid just like the metal is. Depending on your source of the oxide, though, it might be very hard to dissolve if its went through some heavy calcining. I know that's a common problem with pottery-grade oxides.
- In some cases, and especially often with nitric acid, acid concentration plays a role. Depending on concentration you can produce different oxides of nitrogen as a byproduct, usually NO with dilute acid (which gets oxidized by air to NO2) and NO2 directly with concentrated acid. In this case, since I am using concentrated acid NO2 is produced directly (as well as my desired product of Tb(NO3)3 ).
- how can i get my hands into therbium anyway?
- wow your lucky. last time i tried something similar to this in a test tube it made a steam cannon and shot my ceiling.
- Yes it is - myst32YT has a video on it at his channel, actually. I'd only ever heard of the sulfate being fluorescent, but it should be a property of the Tb(III) ion. That's part of what I was testing here, if it would still glow with a different anion.