Amalvin Fritz
The FBI in hazmat is apparently involved in this kid's home lab. He's been doing YouTube videos of his stuff (which I haven't watched yet) and insists he was focused on "therapeutics" for cancer.
Anyone have any guesses what they found that has kept them at his house for a week? What kinds of chemicals would you have to have, or in what quantities, to have such a big deal made about it?
https://redd.it/1rpaxcv
@r_chemistry
Disproportionierung von Hypobromit
Es heißt ja, in wässriger Lösung würde Alkalihypobromit bereits bei Temperaturen oberhalb des Gefrierpunktes binnen 48 Stunden zu Bromid und Bromat disproportionieren.
Nun habe ich hier aber noch eine Hypobromit-Lösung im Schrank stehen, die ich schon vor zwei Jahren angesetzt und damals auch ca. eine halbe Stunde lang gekocht hatte, um die Reaktion zu beschleunigen und evtl. überschüssiges Brom auszutreiben. Heute ist die Lösung immer noch schwach gelblich und riecht typisch nach Hypobromit. Auf Ansäuern wird wieder Bromwasser daraus, damit erfüllt sie den gleichen Zweck wie eine Bromid-Bromat-Lösung. Aber dennoch würde mich mal interessieren, wie es gelingen kann, eine vollständige Disproportionierung zu herbeizuführen. Danke im Voraus für Eure Ideen. 🤗
https://redd.it/1rp486k
@r_chemistry
Silver acting weird
https://www.reddit.com/gallery/1roz771
https://redd.it/1roz8c7
@r_chemistry
Alcohol test from 80s
https://redd.it/1rowd2u
@r_chemistry
Precise heating method
Hi I’m new to chemistry and was hoping somebody could point me in the right direction for a device that can heat solutions precisely. I’m trying to grow pyramid shaped salt crystals with my daughter, but don’t know what the search term for the specific piece of equipment would be? Sorry if this sounds daft, but when I search for hot plates etc, it tends to result in cooking equipment. I need to heat to precisely 60 degrees Celsius for an extended period. Thanks!
https://redd.it/1ro7hol
@r_chemistry
Formation of F-centers in the alkali chlorides under electron beam
https://redd.it/1rn9uf6
@r_chemistry
Chemical safety first, chemistry second
https://abc7.com/post/irvine-teen-breaks-silence-home-science-lab-sparks-fbi-hazmat-investigation/18673914/
https://redd.it/1ropmt6
@r_chemistry
Found old chemistry glassware, need help identifying
https://redd.it/1roccji
@r_chemistry
Weekly Careers/Education Questions Thread
This is a dedicated weekly thread for you to seek and provide advice concerning education and careers in chemistry.
If you need to make an important decision regarding your future or want to know what your options, then this is the place to leave a comment.
If you see similar topics in r/chemistry, please politely inform them of this weekly feature.
https://redd.it/1riqygr
@r_chemistry
Precipitating potassium-chromium salts
I'm planning making chrome alum from reducing a dichromate (with ethanol and sulfuric acid). I have sodium dichromate, and potassium chloride. The idea was to precipitate potassium dichromate by making a saturated sodium dichromate solution and then adding potassium chloride. At 30°C, solubility of sodium dichromate (dihydrate) is about 0,66 mol per 100 mL, and potassium dichromate is about 0,06 mol per 100 mL. Then proceed by reducing the potassium dichromate.
I'm thinking now in making the reduction with the sodium dichromate solution first and then try to precipitate the chrome alum by adding potassium chloride. I have some questions. First, in general, could this work? What species can be obtained after reducing sodium dichromate (I mean, from a solution with Na+, Cr3+ and sulfate?)?
I'm aware that the reaction must occur under around 40°C to obtain the desired chromium(III) complex for the alum.
https://redd.it/1ri00t3
@r_chemistry
Stripping Gold from Ram Sticks
https://youtube.com/watch?v=C0ZkToaULmE&si=ai9Nz7N5VI3O_oZB
https://redd.it/1rhtfbs
@r_chemistry
Pack para Químicos
https://www.reddit.com/gallery/1qwxp99
https://redd.it/1rhqivw
@r_chemistry
I built a real-time 3D molecular sandbox for Android — looking for a few beta testers
https://redd.it/1rho5xn
@r_chemistry
Advice on studying for Gen 1 chem exam 1
I have an exam on Wednesday @ 8am, in 5 days.
I have been a little behind and this is one of my multiple attempts at this class.
To be honest I was going through some stuff in the past and never even tried or attempted I would literally just show up to class go home and not even take time to attempt studying or anything. Then I’d be surprised when I failed.
I’m doing better, when it comes to homework I’m mover “involved” and present. I actually take the time to work through the problems and understand them.
Anyways, I have been a little behind since I’ve been studying for other classes. I have a plan to go over 2 units tonight going over terms and all the math . Tomorrow going over the rest of the 2 units.
I really would like to pass with a B-/B.
Any suggestions or advice how I can study!!
https://redd.it/1rhinyo
@r_chemistry
Buchi Distallation Spider
https://redd.it/1rhbar1
@r_chemistry
how to remove TFA from Mal-PEG2-NH2 TFA?
https://redd.it/1rp3b6d
@r_chemistry
Question basicité et acidité
https://redd.it/1rp27mk
@r_chemistry
Weekly Careers/Education Questions Thread
This is a dedicated weekly thread for you to seek and provide advice concerning education and careers in chemistry.
If you need to make an important decision regarding your future or want to know what your options, then this is the place to leave a comment.
If you see similar topics in r/chemistry, please politely inform them of this weekly feature.
https://redd.it/1royaul
@r_chemistry
Keratin + humidity: how much does small %RH change impact fracture behaviour?
Feather shuttles = keratin under repeated high-speed impacts. Badminton folks talk about “dry halls” killing shuttles, but we're curious from a materials perspective:
How sensitive is keratin (in feathers) to small changes in %RH when it comes to brittleness vs flexibility?
We’re exploring shuttle care systems and want to sanity-check how we talk about ‘too dry / just right / too damp’ in simple language.
https://redd.it/1roud1w
@r_chemistry
Help] How do you actually get high-quality, transparent renders in VMD for MOs and ESPs? (Coming from GaussView)
https://redd.it/1rot0lz
@r_chemistry
Stannous chloride shelf life
So I was just watching a video by nurdrage to make pcb tinning compound, and discovered stannous chloride as a precursor is super simple to make.
Literally just dissolving tin solder in hcl and straining out the silver, copper residue.
So my question is if I were to use this method, and store it appropriately how long could I expect for a shelf life?
Debating whether or not to passively get back into gold recovery, and realizing this would be a great way for me to save money while doing so
https://redd.it/1roqyfb
@r_chemistry
Oil rain in Theran.
For you chemists out there.
I read about oil rain in Iran after the oil reservoir fires.
What component of the oil rains down after a fire like this?
Will UV light from the sun help break down the molecules in any useful way?
https://redd.it/1rohgwj
@r_chemistry
Weekly Research S.O.S. Thread - Ask your research and technical questions here
Ask the r/chemistry intelligentsia your research/technical questions. This is a great way to reach out to a broad chemistry network about anything you are curious about or need insight with and for professionals who want to help with topics that they are knowledgeable about.
So if you have any questions about reactions not working, optimization of yields or anything else concerning your current (or future) research, this is the place to leave your comment.
If you see similar topics of people around r/chemistry please direct them to this weekly thread where they hopefully get the help that they are looking for.
https://redd.it/1rkfnv5
@r_chemistry
One-pot reactions
At school, we are synthesizing a oligothiophene that requires 4 work up steps to obtain the final product. After we were done, I studied the reaction mechanism and thought "what would happen if we left our side product in the batch and continued to the next step. What would we have to adjust to make the next step successful?" I found other that it wouldn't effect the synthesis that much if we added our reagents in excess, which made me wonder if we could simplify the whole process and cut down on the number of work up steps down to two and save a bunch of time and solvents. If that would be possible, oligothiophenes might be able to mass produced for a cheaper price.
Has any of you had the same thought when you have synthesized a complex organic molecule before? Let me know!
https://redd.it/1ri4q78
@r_chemistry
Ernest Rutherford: From humble beginnings to New Zealand's greatest scientist
https://www.stuff.co.nz/national/126163340/ernest-rutherford-from-humble-beginnings-to-new-zealands-greatest-scientist
https://redd.it/1rhw0j5
@r_chemistry
Safety Goggles Recommendations -neoprene
I've got many years of labs in my future, so I'm on the hunt for good quality goggles that are comfortable on my face, preferably with my glasses underneath, as well as having anti-fog and stuff.
The issue I'm running into is that I'm recommended Uvex goggles, but they have neoprene headbands, and I'm incredibly allergic to neoprene. Are there any recommendations that don't have neoprene?
https://redd.it/1rhssdf
@r_chemistry
Trump officials move to kill system that protects US from chemical disasters
https://www.theguardian.com/environment/2026/feb/27/trump-fire-chemical-safety-system-epa
https://redd.it/1rhpso6
@r_chemistry
Improvised Arc Furnace - how to melt almost everything.
https://youtu.be/NHn5Sdo8PZk?si=wSBJHpKyOSX9A5Uf
https://redd.it/1rhg8hg
@r_chemistry
Is there a ChemDraw template people are using to get this style of figures?
https://redd.it/1rgjlx7
@r_chemistry
Used compressed air to cool vacuum system
I built & use an ALD / MLD vacuum system at work. I reserved the reactor for two week to develop a new process but ended up using most of that time to take the entire thing apart and clean it. The last step in the cleaning process was an "alumina bakeout" where i performed 100 cycles of trimethylaluminum & H2O alumina deposition at 120C.
Finally able to use it for my purposes, I needed it to be room temp and it was cooling from 120C. Frustrated that this will take 5 hours of my remaining time on the reactor, I took a can of compressed air and sprayed it into the reactor upside down to cool it off with the cryogenic difluoroethane.
I did this cautiously, mostly from several feet away, and only for 30 seconds of short (1-2 second) bursts. At which point, I came to my senses and remembered that canned air has a denaturant and possibly oil contaminants in it.
Now I feel like a real asshole. I'm cranking the temperature back up to 130-140C and doing 500 cycles of alumina to try to cover up my mistake.
This post is partially "commiserate with me" and partially "does anyone know exactly what contaminants, and exactly how much of those contaminants one would expect to find in compressed air?"
I was using innovera technology essentials electronic duster fwiw
FML
https://redd.it/1rh8uiu
@r_chemistry
