Social Chemistry

CHEMISTRY GROUP NAME

Thu, 11 Jun 2026 13:29:55 +0000

I need help, our teacher told us to think of a group name that is related to chemistry. Do you guys have any ideas or names i could use?

submitted by /u/nagiisangmaganda
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A Journey Into Chemistry: Best YouTube channels and online video courses for learning chemistry from beginner to advanced? Enthusiast learner here

Thu, 11 Jun 2026 12:55:19 +0000

Hi everyone,

I’m planning a serious self-study journey in chemistry and would appreciate some advice from people who have already gone down this path.

For context, I graduated from high school where we studied some Organic & General Chemistry. Old times, but I do have some prior exposure.

I’m now looking to rebuild my chemistry knowledge from the ground up and eventually work through undergraduate and even graduate-level material. Why? I just like to learn things and I think Chemistry is worth it.

I’m especially interested in:

General Chemistry
Organic Chemistry
Inorganic Chemistry
Physical Chemistry
Analytical Chemistry
Biochemistry

ChatGPT told me the names of the latter 3, I have no idea what they are.

Because English is my second language, I'm primarily looking for the best video-based resources, including:

YouTube channels
Full lecture series
University courses available online
MOOCs (Coursera, edX, etc.)
Other websites with high-quality chemistry instruction

Some questions:

If you were starting chemistry from scratch today, which video resources would you use?
Which YouTube channels are considered the gold standard for chemistry?
Are there any complete and free (€s are rare nowadays) university courses / lecture series available online that are worth following?
I prefer videos, but what are some of the best and complete textbooks for high school and college?
Are there any channels or courses that go all the way from introductory chemistry to advanced undergraduate level?

I’m willing to invest some time into learning this properly, so I’m more interested in quality and depth than quick exam-prep content.

Thanks in advance for any recommendations!

submitted by /u/py-net
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college level chemistry online ? help me

Thu, 11 Jun 2026 12:20:45 +0000

hello everyone , just passed my high school and going to local college to to chemistry major ..but here professors are not good enough , private tution is also not available ..is it possible to learn college level chemistry at home online ...i saw some youtube videos ..they are great ..will that lectures will be enough to complete my graduation ..plase help me seniours

submitted by /u/Kooky-Gazelle-1397
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What chemical substances could painlessly end a life in a futuristic story?

Thu, 11 Jun 2026 12:10:55 +0000

submitted by /u/N-deterministAvocet
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Physical chemistry by kundu and jain.

Thu, 11 Jun 2026 12:03:46 +0000

Someone has pdf of this book?

submitted by /u/nadim10000
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I made Chemistry Paper 2 revision videos

Thu, 11 Jun 2026 11:53:31 +0000

Foundation (30 mins): [https://youtu.be/dxIKVXKiAoM\](https://youtu.be/dxIKVXKiAoM)
Higher (34 mins): [https://youtu.be/88zNGt1YnA4\](https://youtu.be/88zNGt1YnA4)
Triple (55 mins): [https://youtu.be/Zr53uzUNrAs\](https://youtu.be/Zr53uzUNrAs)

Every video has chapters in the description, so you can jump straight to the topics you are shaky on (rates, equilibrium, organic, analysis, atmosphere, resources, and Le Chatelier for higher).

If you want to revise one topic at a time instead of the whole paper, I have also chopped each topic into its own short clip in a playlist.

Good luck for tomorrow. You have got this.[AQA GCSE Chemistry Paper 2 Playlist](https://youtube.com/playlist?list=PL1V\_0pmo4\_u\_dE-0tYN8l4liIpGBXFWG-&si=jbdVfKevAk62hs38)

submitted by /u/Ok_Trust_144
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need licensing

Thu, 11 Jun 2026 09:35:26 +0000

AI me i self trrained chemistry need licensed chemist to show im not licensed need to get my license i self tained at 18

submitted by /u/dapolak
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Bromine exposure please help

Thu, 11 Jun 2026 08:36:50 +0000

Hello everyone. A few years ago a friend gifted me a bromine element cube because we thought it was a cool science thing to have. It was sealed in a glass ampule and put into 2x2 inch acrylic cube on top of that. However I think the ampule was faulty and not sealed properly. Because after some time I noticed the orange color pushing into the acrylic but nothing had left the cube yet. I forgot about the cube and it was collecting dust on a bookshelf in my room for about 2-3 years and I just noticed now the orange stuff had started to push its way out of the cube. I discarded the cube and now I am very very worried about my health. I spend a lot of time in my room. The cube is very small and there’s still a good amount of liquid in there I think it’s supposed to be only 1-2ML of liquid in the ampule. But I’m sure there had been some trace amounts of gas leaking into my room this entire time. I’m worried about the long term effects of breathing this and how to recover please help.

submitted by /u/Ok_Score_5897
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Iron/HCl reduction of nitrobenzene flopped. Misunderstanding of the reaction maybe?

Thu, 11 Jun 2026 03:55:52 +0000

TLDR: Got some trash instead of aniline, not sure why. Is this type of thing common with this reaction, I thought Fe/HCl and was such a foolproof thing?

Title. Reduced nitrobenzene with steel wool and concentrated hcl, very loosely following the procedure in vogels, except with iron instead of tin(I heard it works the same). I had a lot of big like lavalamp looking boiling and there was no effervesence of hydrogen despite it being quite exothermic and everything looked really good, and I just kept adding iron until it stopped dissolving and was just floating around in the liquid(definitely a molar excess I am sure)and then I went to neutralize it, where I got a bunch of horrible brown and black precipitate, and a purplish red mother liquor. I figured it was just various iron salts precipitating out so I filtered it off(it was horribly slow) and moved on to the steam distillation.

Aaaand nothing. Didn't distill out any organics whatsoever, aniline or even a less reduced azobenzene/phenylhydroxylamine nonesense which if they were present I would think would come over in a steam distillation regardless. Aside from a like maybe 1ml of nitrobenzene at the very start(this was on almost a mole scale by the way), just pure water distilling over.

I figured it failed and I didn't really feel like figuring out why, I just kinda left it on the table for about 6 months, and when i finally decided to test it, I ended up finding the organics in the precipitate. I dissolved all the precipitate up in HCl, and I figured it was all just iron salts and it would all dissolve up clear but there was leftover a large pile of brown gunk and then a really cloudy yellow/brown solution of iron chloride. I tested this brown gunk and it was resistant to pretty much everything I tried:

Resistant to heat and appears to be kind of fire retardant as well, I tried burning the filter napkin after I squeezed all the water out(great test I know) and it was like really tough to burn although it did char after like 30 seconds blasted with a blow torch. The raw powder heated in a beaker did basically nothing either.

Resistant to hydrochloric and sulfuric acid, although I think it decomposed when I boiled it in sulfuric acid, its hard to tell if the acid went black from the powder or black from oxidizing it to carbon. Resistant to fusion with NaOH as well, although there was a really faint ammonia/even fainter organic amine smell in the fumes as I cooked it, but the fumes were not even strong enough to turn a ph paper...

On searching I found a single source of one guy who was reducing some substituted nitrobenzenes and the difficulties he had were in isolating the reduced product from quote: really expensive shoe polish, which was apparently a self condensation product. I could see this being possible as I read as well(in vogels I think) that the reduction proceeds through a complex with the metal, that then must be decomposed to give the aniline. My only idea is that maybe I precipitated this complex on accident, left it for 6 months, where it self polymerized, into whatever crap sat out in the cup, and is now just garbage.

Thoughts? I thought this was supposed to be a very common transformation, yet I can't really find many cases of results like this. If I were to try it again, is there anything wrong with the procedure: a bunch of steel wool or iron filings is added to a flask of nitrobenzene, then concentrated hcl is added so that the solution maintains a close to boiling temperature, say 80c or so, and more hcl and iron is added until it stops dissolving and the solution is monophasic( I dont know if the leftover iron bits is relevant I just feel like once the metal stops reacting its probably finished, I definitely remember it being one phase though), the solution is made strongly basic with NaOH, the iron salts filtered off, and aniline is steam distilled out. Iron is more reactive than tin, would zinc be even better here? Does it really make that much of a difference?

submitted by /u/zestierclosebee
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Confusion period

Thu, 11 Jun 2026 03:10:39 +0000

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Busco colorante incoloro e insaboro que pinte la boca al contacto con la saliva

Thu, 11 Jun 2026 01:55:47 +0000

Alguien está robando mi comida y quiero marcar quien es, podrían ayudarme para poder saberlo, si es posible que el colorante sea difícil de quitar y de un color resaltante, como amarillo u azul

submitted by /u/babybitersis
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How hazardous is rust created from nitric acid fumes?

Thu, 11 Jun 2026 00:24:16 +0000

curious how hazardous the dust particles of paint and rust caused by nitric acid fumes would be? does the dust hold onto absorbed acid over long periods of time?

submitted by /u/AlarmingFig4187
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How much of a chemical hazard do car tires pose in everyday life?

Wed, 10 Jun 2026 22:45:10 +0000

I've recently come across a number of articles which suggest that car tires (and items made from recycled car tires, such as crumb rubber) may present a chemical hazard at various points throughout the tire lifespan:

Chemicals found in motor vehicle tires: https://dtsc.ca.gov/scp/chemicals-in-motor-vehicle-tires/
Car tire emissions and microplastic pollution: https://e360.yale.edu/features/tire-pollution-toxic-chemicals
Chemicals from car tires and crumb rubber: https://phys.org/news/2026-01-rubber-decays-potentially-dangerous-chemical.html
Chemicals from crumb rubber made from recycled tires: https://www.nbcnews.com/storyline/artificial-turf-debate/rubber-mulch-safe-surface-your-childs-playground-n258586

Given that rubber is a polymer, my understanding is that theoretically, chemicals added to the car tire would probably be bound to the rubber matrix. However, I am unclear whether these would be covalently bound or not. I have the following questions:

How securely are the chemicals in car tires bound to the rubber matrix?
From a day-to-day perspective, if you were to touch an intact car tire, would the amount of these chemicals you might get on your skin or clothing or other items pose a health or safety concern?

submitted by /u/jun192022
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Best Antibacterial?

Wed, 10 Jun 2026 20:09:48 +0000

submitted by /u/Affectionate_Bee1540
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Trying to identify a glass etching chemical that works much better than HF or ammonium bifluoride

Wed, 10 Jun 2026 20:09:25 +0000

I do glass etching and record videos of the process.

Commercial etching creams are a bit of a pain to use, they’re not readily available where I live, and importing them is quite expensive. For a long time I’ve been using a chemical solution that someone gave me years ago, but I have no idea what it actually is. The results are fantastic and much better than anything else I’ve tried.

Recently I started trying to figure out what the chemical might be. After searching through various forums and discussions, most people suggested that it was probably hydrofluoric acid (HF) or ammonium bifluoride. I managed to obtain both and tested them.

Surprisingly, neither produced results even remotely similar to the mystery solution. Instead of quickly creating a uniform frosted finish, both took a very long time and mainly formed a soft, paste-like layer on the glass surface that could be easily scraped off. The etched finish underneath was poor compared to what I’m used to.

I still have a small amount of the original solution left. It is transparent but has a slight greenish tint.

I’m aware that identifying an unknown chemical from appearance alone is difficult, but I’m curious whether anyone has encountered something similar. Are there any glass etching chemicals or formulations that could produce significantly better results than HF or ammonium bifluoride and have a clear, slightly green appearance?

Any ideas would be appreciated.

submitted by /u/ContactReasonable909
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Tin Experiments

Wed, 10 Jun 2026 19:30:38 +0000

I’ve been doing some experiments without really looking anything up (i’m not working with anything dangerous, just messing around with some stuff)

I melted down some tin for a casting project i’ve been working on and got curious about the resulting slag. kind of on a whim, i freeze distilled some household vinegar (not sure on efficacy, so let’s call it marginally concentrated) and left the tin slag to sit in the acetic acid. it turned to sludge over the next few days while a stir bar agitated everything. i then turned off the stirring since it had gotten so viscous. the next time i looked several days later it had separated some. it was less sludgy and had developed little nodules. i added more acetic acid and more slag scrap and transferred it to a larger vessel to react and filtered it through coffee paper before returning it to the vessel.

the acetic acid evaporated at room temperature over the course of a few more days and the little nodules began to form crystals. long shoots with flat tops. they look a bit like fungal fruiting bodies. the material once fully dried is light, hard but very brittle.

my initial assumption was that it was crystallized tin oxide. i can’t find any existing results from doing something like this. my search results for similar things are only giving me info about precipitated tin oxide for use as a semi conductor.

after a second thought, it seems more likely that it’s tin acetate, right? although the preparation i’ve seen for that seems quite different from what i did

any thoughts/ideas about what happened here?

submitted by /u/probably-not-maeve
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With current gas prices, why not create synthetic gasoline?

Wed, 10 Jun 2026 18:41:30 +0000

Not looking at the price to build the infrastructure, couldn't gasoline be synthetically made in a facility to offset the rising cost of gasoline? With that being said, would synthetic gasoline have a negative effect on a car's engine? And what would the effects be on the environment look like with synthetic gasoline vs gasoline being extracted from oil?

submitted by /u/travisihs08
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Lab quality - Omega vs USDTL

Wed, 10 Jun 2026 17:46:48 +0000

Does anyone here any thoughts on the quality of lab reporting and accuracy between Omega and USDTL, for hair testing - ETG and other metabolites?

Are they both similar in quality and reliability? They both advertise as being accredited in the legal and forensic scenes.

If a client were to interchange their hair testing between these 2 labs, can we expect consistent/precise results?

submitted by /u/Universe93B
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Dark brown staining on skin from basil

Wed, 10 Jun 2026 15:05:43 +0000

Hey y'all,

every time I harvest my basil for pesto, I get dark brown stains on my fingers that don't wash away with soap and water. Any clues what they might be, and what I could try to get rid of them? I would've guessed some kind of degradation product of chlorophyll, but maybe someone more versed in phytochemistry can help me out.

submitted by /u/NyxWhiteFang
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Resources that can help me learn more about nucleation sites

Wed, 10 Jun 2026 14:38:41 +0000

I am planning to embark on a personal research on chemical gardens, and naturally, I need to learn more about how the chemicals bring about this phenomenon. This has led me to learn about how nucleation sites act as hygroscopic molecules that cause crystals to grow around them, which I believe will help me to learn more about some chemical candidates i.e. sodium acetate and silicates.

So I need your help with reliable papers that can help me to further learn about this so I can optimize the experimentation process.

submitted by /u/NightRunnerAfterDusk
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超重元素の現在の性質に意見

Wed, 10 Jun 2026 14:09:05 +0000

104番から118番、未だ見ぬ119番以降の元素の今現在の性質について反論がある方の意見を求めます。

submitted by /u/Similar_Badger2381
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It's CO2L to still get surprised by stuff!

Wed, 10 Jun 2026 11:07:41 +0000

submitted by /u/PlatypusWhole1936
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Heavy metals result exceeding 1 million mg/kg - is it possible?

Wed, 10 Jun 2026 11:00:49 +0000

Hello and good day.

Firstly I’d like to apologise for this long post/question.

I tried using the search function but could not find any related topics/discussion.

Is it possible to obtain heavy metal results exceeding 1 million mg/kg in a sample?

Background as below:
Our lab received a solder dross sample and customer requested for heavy metals analysis.

We digested the sample using microwave method (based on USEPA 846 SW 3051 A), and then analysed the sample via ICP-OES (based on USEPA 846 SW 6010 B).

We entered the sample weight (digestion) in the ICP software and results were converted by the software from mg/L to mg/kg.

When analysing the sample, we had to dilute the sample because the result for ‘Tin’ exceeded our calibration range (1 mg/L - 10 mg/L). The sample was diluted with 1,000 dilution factor and the result fell within the calibration range (about 5 mg/L). The final result was about 2 million mg/kg when converted.

Logically speaking, I think this is not possible because it means that Tin in the sample is >100%, but please correct me if I’m wrong.

I thought about retesting the sample (including digestion) but I would like some advice on this matter if there are any exceptions that I am not aware of for any results exceeding 1 million mg/kg.

Thanks.

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Azeotropic alloys?

Wed, 10 Jun 2026 10:13:53 +0000

A thing I've been thinking about: is it possible for an alloy like, say, brass (copper -zinc) to be an azeotrope? If so, what is the ratio of one to the other? If not, why not?

submitted by /u/Emotional-Edge-8259
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Im tarded sometimes

Wed, 10 Jun 2026 08:51:21 +0000

I was kinda drunk in a night and where i was there was a unlabeled plastic bottle of what i thought was moonshine (i live in a balkanic country) but after some more inspectection i think i ve drank acetone (smell of it was kinda similar with nail polish) and had somewhat of a fruity taste.

Didn t got sick just actually more inebriated i would say pretty fast.

Let s say if indeed was acetone how bad the damage could be? Or what else maybe less bad couldve been in that bottle?

There is also a flame test to that specific liquid.

submitted by /u/BENZYbert
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Weekly Research S.O.S. Thread - Ask your research and technical questions here

Wed, 10 Jun 2026 07:00:35 +0000

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.

submitted by /u/AutoModerator
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Hi Redditors, I got stuck in a mechanism of amine formation using azide and LAH. Please help!

Wed, 10 Jun 2026 06:39:54 +0000

So I saw a flaw in direct reaction of alkyl halide with ammonia is that it isn’t controlled much. So we use azide and LiAlH4 which reduces the formed RN3 into RNH2.

Now I got stuck in three steps and couldn’t find the mechanism in Clayden or on the internet.
A. How did that hydrogen shift from terminal Nitrogen to the Nitrogen connected with R. Could you draw a mechanism for that?
B. Where did we get proton from to feed that amine aluminium complex and its hell nucleophilic. Hence forms RNH2
C. And how do we replenish LiAlH4? Or does that vanishes somewhere as some random aluminium byproduct ?

Hope some chemist enthu answers this and also tell me the physicality of this reaction if u have done it in labs.

submitted by /u/No_Public_4363
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The scientific side of art restoration

Wed, 10 Jun 2026 06:15:24 +0000

Hi! I'm in my senior year of college and I'm planning to do my thesis around art restoration/conservation and I was wondering if anyone has resources/insights about that field. I want to focus on the analysis or conservation of paintings, so I've mostly been looking into pigment analysis and fiber/wood analysis but I'd like to hear if there's more about the field than that! I just want to hear more about it as my future goal is to be an art conservator and I want to hear about that world from people who deal with the more analytical side of it.

submitted by /u/Wrong-Concept1262
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My tragic phone story

Wed, 10 Jun 2026 04:05:51 +0000

Wait my phone story will be intresting...

In my college my first phone is keypad, then I changed to my mom's old samsung J7, that mobile has suddenly a battery problem it became to heat. So I placed a wet cloth over it, unfortunately the water short circuted it.

next phone is jio phone while driving that phone fell out of my pocket and a heavy truck crushed it.

My next phone is my dad's old blackberry z10, while playing with my firends. Accidentally display is damaged but still working. I love that phone soon I will replace the display.

My next phone is Tecno mobile with 7000mah battery. That mobile became 1 year old. It suddenly feel to lag and produce lot of heat. So I ordered samsung M35. On that M35 delivery day I was working in a college project. That was the dumpest thing I ever do. In 2 days I need to submit final year. I was in hurry, I used that chat gpt. From that moment I stopped using it in important studies. I asked chat gpt a Idea about non conductive liquid coolant for PC. There is only one liquid that liquid is also flourine or flouride something like that. That’s very dangerous to produce it. Then chat gpt suggested me benzene. Yes benzene......... I submerged my Techno mobile in that benzene solution. Benzene will soften and slightly melt that polymer in my phone and it affected mobile display. It's not chat gpt mistake it was mine. The dumbest chemical engineer. Who will put a mobile in benzene.

submitted by /u/Typing-Deleting
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Looking to hire someone to walk me through MCAT synthesis ( not physically, )just in concept.

Wed, 10 Jun 2026 02:48:17 +0000

Anyone interested in?

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Mettler Toledo Titrator Tubing Alternative

Wed, 10 Jun 2026 02:29:40 +0000

I recently purchased a used Mettler Toledo T50 + Rondo 60 titrator, and some of the tubing is pretty nasty. Replacements from Mettler are... insane. As are the beakers! Because the lab is just a side gig for local wineries, I really need to keep costs down. Does anyone here have sources for cheaper alternatives for these consumables? Thanks!

submitted by /u/Illustrious_Pea_8632
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Synthesis of Ag Nanowires

Wed, 10 Jun 2026 01:59:26 +0000

submitted by /u/Axe1Rose
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Odd smell in Laundry

Wed, 10 Jun 2026 00:46:22 +0000

submitted by /u/NotAPlumber01
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Is a Strategic Arsenic weapon possible?

Wed, 10 Jun 2026 00:12:20 +0000

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Carbon dioxide can selectively oxidize alkenes

Tue, 09 Jun 2026 23:18:29 +0000

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Some nice nitrates!

Tue, 09 Jun 2026 22:44:10 +0000

Pictures 1-3 are silver nitrate, and pictures 4&5 are lead nitrate! Both produced from the corresponding metal and azeotropic nitric acid.

submitted by /u/BenAwesomeness3
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Personal Tutor?

Tue, 09 Jun 2026 22:36:52 +0000

I have no experience or knowledge in chemistry whatsoever!

I am looking for a personal tutor who would like to genuinely teach(not just tell me something off of Google that I cant understand) I want someone to break down certain reactions and the equipment needed, explain the loss and gain of mass between conversions, and the actual changing of chemicals and what causes them. Like I said initially I have no experience whatsoever so if you are willing please be patient.

submitted by /u/Inevitable_Rush9408
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Should Magnesium Malate Be Sour?

Tue, 09 Jun 2026 22:32:43 +0000

In the past, I've purchased malate that tasted sour. The brand reformulated, and, along with every other brand, it's all no longer sour- it's chalky and relatively tasteless. This leads me to believe that it's magnesium oxide being fraudulent sold as magnesium malate, but, it's just a guess, and I was hoping there would be someone in this reddit who's more familiar with this compound- and chelation in general.

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Patterns

Tue, 09 Jun 2026 20:31:22 +0000

11 Sodium (Na) — Spin +1/2 | Vector [0,0,1] | Obliquity 0.85 | Charge +1 | Rate 0.60

12 Magnesium (Mg) — Spin 0 | Vector [0,0,-1] | Obliquity 0.80 | Charge +2 | Rate 0.56

13 Aluminium (Al) — Spin +1/2 | Vector [0.5,0.866,0] | Obliquity 0.75 | Charge +3 | Rate 0.52

14 Silicon (Si) — Spin 0 | Vector [0.707,0.707,0] | Obliquity 0.70 | Charge +4 | Rate 0.48

15 Phosphorus (P) — Spin +1/2 | Vector [0.866,0.5,0] | Obliquity 0.65 | Charge +5 | Rate 0.44

16 Sulfur (S) — Spin 0 | Vector [1,0,0] | Obliquity 0.60 | Charge -2 | Rate 0.40

17 Chlorine (Cl) — Spin +1/2 | Vector [0.866,-0.5,0] | Obliquity 0.55 | Charge -1 | Rate 0.36

18 Argon (Ar) — Spin 0 | Vector [0.707,-0.707,0] | Obliquity 0.50 | Charge 0 | Rate 0.32

19 Potassium (K) — Spin +1/2 | Vector [0.5,-0.866,0] | Obliquity 0.45 | Charge +1 | Rate 0.28

20 Calcium (Ca) — Spin 0 | Vector [0,-1,0] | Obliquity 0.40 | Charge +2 | Rate 0.24

21 Scandium (Sc) — Spin +1/2 | Vector [-0.5,-0.866,0] | Obliquity 0.35 | Charge +3 | Rate 0.20

22 Titanium (Ti) — Spin 0 | Vector [-0.707,-0.707,0] | Obliquity 0.30 | Charge +4 | Rate 0.16

23 Vanadium (V) — Spin +1/2 | Vector [-0.866,-0.5,0] | Obliquity 0.25 | Charge +5 | Rate 0.12

24 Chromium (Cr) — Spin 0 | Vector [-1,0,0] | Obliquity 0.20 | Charge +3 | Rate 0.08

25 Manganese (Mn) — Spin +1/2 | Vector [-0.866,0.5,0] | Obliquity 0.15 | Charge +2 | Rate 0.04

26 Iron (Fe) — Spin 0 | Vector [-0.707,0.707,0] | Obliquity 0.10 | Charge +2 | Rate 0.00

27 Cobalt (Co) — Spin +1/2 | Vector [-0.5,0.866,0] | Obliquity 0.05 | Charge +2 | Rate 0.96 (cycled)

28 Nickel (Ni) — Spin 0 | Vector [0,1,0] | Obliquity 0.00 | Charge +2 | Rate 0.92

29 Copper (Cu) — Spin +1/2 | Vector [0.5,0.866,0] | Obliquity 0.95 | Charge +1 | Rate 0.88

30 Zinc (Zn) — Spin 0 | Vector [0.707,0.707,0] | Obliquity 0.90 | Charge +2 | Rate 0.84

Representative Mathematical Diagrams (full sequence follows same clean template):

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Igcse edexcel chemistry

Tue, 09 Jun 2026 15:57:37 +0000

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Job Hunting

Tue, 09 Jun 2026 15:55:28 +0000

submitted by /u/__Lax_
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Can coffee aroma be captured through distillation?

Tue, 09 Jun 2026 15:55:22 +0000

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Silver nitrate

Tue, 09 Jun 2026 14:42:12 +0000

This is why you always wear gloves with silver nitrate! I was taking care of a beaker previously containing very concentrated silver nitrate solution after I prepared it from nitric acid and silver metal. I was stupid and didn’t wear gloves, and a drop fell on my thumb when I was moving the beaker. Here it is a day later (please don’t comment on my finger nails lol). Now my thumb is that much more valuable I suppose with the added silver!

submitted by /u/BenAwesomeness3
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Another one of my silly science comics

Tue, 09 Jun 2026 14:29:49 +0000

submitted by /u/PlatypusWhole1936
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Is there any chance of getting a good college with these marks in CUET 2026?

Tue, 09 Jun 2026 14:21:29 +0000

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Żart w szkole

Tue, 09 Jun 2026 08:07:33 +0000

Za niedługo kończe 8 klasę i chcę zrobić żart z kwasem masłowym ale nie wiem jak go zdobyć lub zrobić.

Czy mógł by mi ktoś powedzieć jak go zrobić w 2 tygodnie

submitted by /u/ResearchImportant836
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Incho aspirant needing help

Tue, 09 Jun 2026 04:45:53 +0000

so i am a incho aspirant and i want to reach ocse camp for the chemistry Olympiad in india (icho is the final stage)
any advice for me, i am in 10th.
i am feeling the pressure, i have a lot of syllabus to cover but i also have jee mains level (elementary level) coverage of full 11th and 12th class chemistry. (basically eqilibrium, mole concept, atomic st, P.T, chem bonding, coordination complexes, etc)
is it possible for me to make use of atkins, jd lee and clayden in like 7 months and qualify to reach camp?

thank you in advance

submitted by /u/DependentMuch2119
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I made a free tool that shows how chemicals affect plants down to the molecular level. Would love a mechanism check. (Quick note: please don't take this as an advertisement. The tool is completely free, I'm not selling anything, and I'm only here for hone

Tue, 09 Jun 2026 04:29:36 +0000

Hi all! I made a free interactive lab that models how chemicals affect plants, and I am hoping for feedback on the cellular and molecular side.

You choose a chemical, apply it to a plant, and see the effects across three levels: the whole plant (macro), the cells (micro), and the molecular level. The goal is to make the invisible biochemistry visible, so you can watch how a compound moves through the plant and what it disrupts.

If you have a background in cell or molecular biology, I would really appreciate your eye on whether the mechanisms feel right and where I could go deeper.

Any questions, email me at anmosman@gmail.com. Thanks!

submitted by /u/Jaded_Cranberry4355
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A single "distance-from-half-filled" descriptor out-predicts electron count for oxidation-state richness in transition metals -known chemistry re-encoded, or worth a closer look?

Tue, 09 Jun 2026 04:18:53 +0000

I ran a small cross-validation experiment and I'd like the sub to try to break it.

Across 30 transition metals (3d/4d/5d, groups 3–12, neutral ground-state occupancies), I tested whether a one-parameter descriptor — how close the d-shell sits to half-filled, d_balance = 1 − |N_d − 5|/5 — predicts the number of representative oxidation states.

Under leave-one-series-out cross-validation it had the lowest error of the simple baselines I tried:

d_balance: LOO-RMSE 1.23 (R² ≈ 0.55)
electron count (N_d): 1.65
group: 1.66
period + group: 1.75
atomic number Z: essentially no single-feature signal (R² ≈ 0.03)

Richness peaks at d⁵, and the oxidation span behaves similarly (LOO-RMSE 1.48).

I want to be upfront about the weak spots, because they're why I'm posting and not claiming a result:

That d⁵ is "special" is textbook (exchange energy / half-filled stability). The only non-trivial part is that a single half-filled-distance feature out-predicts electron count — not that the peak exists.
The d⁵ vs d⁴/d⁶ contrast is positive (mean 5.00 vs 3.75, Δ = +1.25), but the 95% bootstrap interval [−0.35, 2.85] crosses zero. Small sample (5 vs 4 elements). So: suggestive, not established.

My actual questions:

I have not yet compared this against chemical-property baselines — electronegativity, ionization energy, ionic/covalent radius. My worry is that a U-shaped function peaking at half-filling is just re-encoding one of these. How would you design that comparison cleanly, and is this already a known result I'm reinventing?
What's the least arbitrary single-source protocol for "representative oxidation states," so the count isn't quietly curated to fit the descriptor?

Happy to share the dataset and analysis code.

Full preprint, dataset and code:

Link

the write-up frames this inside a non-standard theoretical conceptualization that I'm deliberately bracketing here — the claim above stands on its own and doesn't depend on it.

submitted by /u/Endless-monkey
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SEAL AA500 Segmented Flow Analyser users - anyone?

Tue, 09 Jun 2026 04:04:12 +0000

Hello all

Last year our laboratory took receipt of a SEAL AA500 segmented flow analyser. This was to replace our Lachat FIA.

Our commissioning process has been dragging on, in large part due to the AACE software having a recurring memory access violation error. We were wondering if there are any other users out there of SEAL SFAs and whether they have encountered software bugs, and if you have, did you find any solutions?

We have tried installing the AACE software on 4 different computers, including fresh installs. One common factor is they all run Windows 11, so we're keen to hear from anyone using AACE on windows 11. The only other lab we know of with a SEAL AA is running an AA3 on windows 10 without issue.

For us, the issue seems to be fixed when we have a fresh system install, but over the course of a week or two at random points we get a windows "Memory Access Violation" pop up and the system falls over requiring a full restart. The pop-up can occur at any point though seems more frequent if you're interacting with the software/system in any way.

We're frankly at a point where we're considering returning the instrument as in its current state it is clearly not fit for purpose, not even able to complete a single run. User error can be disregarded as the countries distributor/engineer has done the set-up and installs, including on a computer that they provided that "should" have been compatible.

submitted by /u/Revolutionary-Tie753
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