Why can't hybridized orbitals create pi bonds?
Like for example, if we take ethene, instead of 3 sigma bonds by sp2 and one pi bond by pure p orbitals in the C atoms, why cant we have sp3 hybridization in both C atoms? 3 of the hybrid orbitals can form sigma bonds and the other one can form a pi bond? Is there a specific alignment of hybridized orbitals which prevents them from forming pi bonds?
https://redd.it/1lqo4fg
@r_chemistry
Does CO2 escape from solutions
I know that when HCl is added to solid sodium carbonate CO2 is produced
What if it is a solution? Would it escape and leave the solution with just sodium chloride or would it dissolve and produce carbonic acid?
https://redd.it/1lqokdi
@r_chemistry
I have opted for chemistry as my major. What advice would you give me?
https://redd.it/1lqmbnc
@r_chemistry
Bleach safe containers
So may sound strange, I want to treat some of my support for my paintings in bleach, the issue is they would need to sit in a 5% aqueous sodium hypochlorite (NaClO) solution for 1-2
days. Maybe longer…. I’m trying to make transparent wood( look into Siegfried fink and the work that has followed after him if curious). So what sort of container can I store them in while they soak, it would need to be airtight since they need to be stored in my apartment so the summer heat doesn’t degrade the bleach (and I have pets so I don’t want bleach in the air). Also ideally not a deep container yet a large diameter (probably the wrong word but I hope you understand). Also I’m not a chemist obviously I am a painter so I was wondering if I could reuse the bleach a certain amount of times or does it lose potency(? Potentially another wrong verbiage) This may not be the page to post this on but I don’t use this app much and don’t know where to go.
https://redd.it/1lqkbbx
@r_chemistry
Looking for ANSI Z87+ Googles for over glasses
Hi! I'm a student looking for some ANSI Z87+ rated goggles that will fit over my prescription lenses as I do not have contacts. There are many choices on the internet so I was hoping for some solid advice/reviews before I buy some. Any that you really recommend? Thanks!
https://redd.it/1lq8dxz
@r_chemistry
I bought 100 g of caffeine
https://redd.it/1lq58mx
@r_chemistry
Need Help regarding future scopes in Chemistry
I'm a B.Sc. chemistry student going to start my 2nd year in a month, studying at a central university. Actually I needed help regarding future scopes in Chemistry in Industrial and Academic fields, and what should be my roadmap be like and what skills should I develop along with my academic life(though I have a feeling to go for computational chemistry, not sure yet). Any suggestions is highly respected, please do reply
https://redd.it/1lq1gpc
@r_chemistry
Could a used oil drum ever be a safe grill
Apologies if this is the wrong sub to ask, but the rules seem to be okay with it. I’ll start by saying I haven’t actually done this and the information I can find suggests it isn’t worth the risk but i’m curious
Is it possible to make a grill from a used oil drum without it being a health hazard?
Assume the drum is steel and has no liner. If one were to use a heavy detergent to clean it, then drill ventilation holes, and then burn intensely several times, could the risk of the harmful chemicals associated with oil be eliminated? or is there no amount of burning or treating that would make using an oil drum grill a safe idea
Bonus question: I understand that the fumes of these burns would contain pretty harmful compounds. If anyone has any insight into the environmental impacts of such a task compared to what typically happens to disposed empty used oil drums, i’d also love to hear them.
After a brief search I’m mostly ready to conclude that one should never do this and should just get a grill, but i would love to hear from some chemists what is actually occurring
https://redd.it/1lpx3q8
@r_chemistry
Underground Chemistry
https://redd.it/1lptyue
@r_chemistry
The Nitrosation of Lysine and Glycine
https://redd.it/1lpqg38
@r_chemistry
Why Foam Behavior Matters in Cosmetics – Science from KRÜSS
Most of us love lather, but foam isn't just a feel-good factor — it's measurable, testable, and impacts product effectiveness. KRÜSS, a leader in surface science, breaks down the principles behind foam optimization in their recent webinar.
If you're into formulation or cosmetic R&D, this one's a gem.
📖 Read the full blog here
https://redd.it/1llqusf
@r_chemistry
What 3D Prints should I print that are useful in a chemistry lab?
Anyone have experience with 3D prints that they have used that they’ve found useful for day-to-day work in a chemistry lab? Organic chemistry for me but anything generic also helpful.
E.g NMR tube racks, little labels that fit onto the straw of squeezy solvent bottles etc.
https://redd.it/1llnvin
@r_chemistry
What are some actually cool and different chemistry experiments?
We'll be having a science fair in a few months and as 11th graders, we will be presenting an experiment to Junior highschool students.
I've been researching about some experiments we can do but I feel it's quite too common, I want to do something that will amaze the students and something that haven't been done too much before.
So.. I thought asking here. Does anybody know a few not so technical ones? I'd appreciate some!
https://redd.it/1llekk8
@r_chemistry
Help identifying sealed glass
https://redd.it/1ll8o06
@r_chemistry
Free ticket to ACS 2025 in D.C. - Just help at my booth!
I'm the guy who made the lab coats with a lot of help from this sub and r/labrats. For the first time, I got a booth at the ACS Fall meeting in D.C. the 3rd week of August. Problem is, I don't have hired salespeople to help run the booth.
I get 2 free registrations (1 for me), so I would love to recruit an actual chemist or chem major to come be an ambassador at the booth with me rather than a random marketing person. I would need roughly 3 hours of help each day during the rush hour times, and the other 4-5 hours you'd be free to attend sessions, network, and learn.
With all the funding cuts, I'm sure there's a few grad students out there who were told they can't go. I can't pay for your lodging but I can cover meals, so if you live on the East Coast this might be an easy win for you! Plus, working the booth will get you lots of introductions if you're job hunting (bring your business cards!)
Any takers? Please send me a DM if if you're interested in helping with the Genius Lab Gear booth!
Oh, and I'll give you a free lab coat to take home, too :)
https://redd.it/1lqpxuz
@r_chemistry
What job can I get with an associates in chemistry?
I’ve got two degrees, an A.S in criminal justice, and a B.S of Criminal Investigation and Forensic Science. I want to work in a lab— and have SOME chem/bio stuff as I’ve done the forensic science bit, but I wonder if getting an associates in chemistry from a local CC would help me get in with lab jobs and possibly a crime lab?
https://redd.it/1lqnfmf
@r_chemistry
Advice On Interview for Assistant Scientist Position
Hi guys! So I'm a recent graduate with my bachelor's in chemistry and a specialization in nuclear and radiochemistry. When I say I recently graduated I mean that I graduated around 3 months ago. I have undergraduate lab experience in both an electrical engineering lab as an REU and as an undergraduate researched in an atmospheric lab. My only nuclear science experience was in an undergraduate lecture and lab class.
I have been applying for jobs all over the place and not receiving many positive responses (as to be expected due to the fact I am a recent graduate with not much experience) but I recently saw an opening for an assistant scientist position at a university nearby.
They have an amazing nuclear science program and the position is within that facility. I knew it was a long shot when I submitted my resume and cover letter but to my surprise they called me to schedule an interview around 2 days after I applied.
Now I'm worried I don't have enough experience with nuclear science to be able to land the job. Most of my actual research lab experience was in atmospheric chemistry and I don't know how applicable it will be to the research they'd want me to do.
Does anyone have advice on what I should research before my interview? Is there anything in particular I should highlight that they might like?
Thanks for your advice!
https://redd.it/1lqk4a4
@r_chemistry
Advice on molecule tattoo
https://redd.it/1lqjqk5
@r_chemistry
How does the platinum catalytic converter in this (Japanese/Zojirushi) fish roaster prevent smells?
Zojirushi fish roaster (https://store.zojirushi.com/products/efvpc) has a platinum catalytic converter that they say prevents odors/smoke and never needs replacing.
How does the platinum work to reduce/absorb vapors/smoke and last 'forever'?
https://redd.it/1lq9dlf
@r_chemistry
Questions about Lead-Out's Safe Lead-Conversion claims
Lead-Out is a product that claims to be a "safe, permanent solution turning hazardous lead paint into non-hazardous paint waste."
The key ingredient is the "Converting Agent Mixture (Calcium Sulfide, Calcium Carbonate, & Calcium Phosphate)". The brochure I've linked below claims that this technology was developed by Solucorp for use on a Superfund site:
>Solucorp® developed a patent-pending system to reduce the leachability of heavy metals in soils, slags, and other solid wastes. Metal compounds are rapidly converted to less-soluble metallic sulfides. MBS® utilizes proprietary chemicals to treat the soil; soils can be excavated and treated in a pug-mill or in situ using soil mixing augers. The technology was demonstrated at the Midvale Slag Site in Midvale, Utah. Three waste streams, contaminated with arsenic (As), cadmium (Cd), and lead (Pb), were treated; approximately 500 tons of each waste was treated. A second test of 500 tons of one waste was conducted by Solucorp using EPA’s protocol and oversight contractor. Toxicity Characterization Leaching Procedure (TCLP) leachable Pb concentrations were reduced to below the regulatory limit.
My questions are as follows:
1. Is Lead Sulfide indeed less harmful to humans and the environment than other forms of lead? My understanding was that all forms of lead are harmful.
2. Is the mitigation of "leaching" as described above really the key for reducing risk regarding stripping and disposing of lead-based paint?
https://static1.squarespace.com/static/5b4242afd274cbbf946fd8ba/t/5b4d01546d2a7346d7407c14/1531773281124/LEAD-OUT-Marketing-Packet-2014-RETAIL-RGB.pdf
Edit: Here is an EPA report on the "Molecular Bonding System" that was used:
https://nepis.epa.gov/Exe/ZyPDF.cgi/10002AE6.PDF?Dockey=10002AE6.PDF
https://redd.it/1lq6ws2
@r_chemistry
Solvent Storage
The lab I work for has been storing ~500ml samples of a wide range of solvents such as n-butanol, cumene, xylene, naphtha, various aromatics and more in LDPE and HDPE plastic bottles. Many of the solvents leech through the plastic or even deform it over time. HSE won’t let us use glass for storage. I’ve read Teflon plastics won’t have this problem but all the PFA and TFE bottles I see on Fisher and Granger are $1000+ for 4 bottles. Any reason to not store these in a lined screw top metal pint can?
https://redd.it/1lq3lxr
@r_chemistry
Best way to learn chemistry in-depth?
This is mainly directed at chemists, chemistry teachers/professors, or someone who studied chemistry extensively. I had to take a lot of science classes in college but I struggled in them mainly because they moved too fast for me and I had bad study strategies for college. I would like to revisit these sciences which includes chemistry. What are some good in-depth resources to use where I can learn a lot about chemistry at my own pace?
https://redd.it/1lq01qc
@r_chemistry
Started my dream student job
https://redd.it/1lpv21m
@r_chemistry
Turning sea cucumber into leather??
I'm currently in Senior Highschool, and we have this SIP( Science Investigatory Project) in chemistry. me and the other members originally want to make bio leather made out of citrus fruit peels but out professor insisted on turning multiple sea cucumbers into a big sheet of leather if we want a perfect grade.
Its fine if we stick with the fruit peels but it will also cost me my grades, like why sea cucumbers?? I don't even know where to start , there's barely any articles about it , I feel like i'm just being an idiot.
any suggestions of where I should start? I'm desperate . ToT
https://redd.it/1lpsw5j
@r_chemistry
Slightly paranoid question about poisons
Is there a fairly straightforward way to poison someone slowly over months, if they leave a house and want to harm the next inhabitants?
I have a really bad tenant and I feel that despite treating her really well over the years, the person that she turned out to be, she might get an idea to retaliate. Never thought someone would go so low, but my spouse is a wise person and gave that hint.
Just wanted to understand if it's fairly easy to effectively plant some chemicals that won't smell but do their "job" over time silently. Would one be able to purchase ingredients (this is in the UK) and hide inside the property, and are there compounds that would get released in sufficient quantities over a long time?
I should have kicked her out a long time ago but I tended to believe in good honest people (but this now changed quite a bit).
Why I'm asking is if it's easy to achieve, I'd be less inclined to give her the impression that I'll be moving in at all.
EDIT: What would be reasonable defence strategies e.g. airing the property for a week or I dunno repainting, opening skirting boards, whatever.
https://redd.it/1llszkn
@r_chemistry
6-mercaptohexanoic acid
Has anyone used 6-mercaptohexanoic acid in chemical reactions? What color is it supposed be and how do you handle the chemical? Mine is white in color (since it was shipped) and SDS says it should be colorless. I'm thinking it has been oxidized or degraded, which makes sense since I keep failing my nanocluster reactions.
https://redd.it/1lllq1g
@r_chemistry
Sigma-Aldrich Sells Peanut Butter???
https://redd.it/1llf0oh
@r_chemistry
Sodium Chloride as replacement for Calcium Chloride for PCM
I recently watched a video about making Phase Change Material cooling packs, and the primary ingredient used was Calcium Chloride. That is difficult and more expensive to source during the summer as ice melt isn't stocked. I was wondering if I could swap in Sodium Chloride for this instead as I can get it much easier, and the melting point according to google is very similar. The process involves boiling the salt and adding Xantham gum.
Will this have a similar phase change temperature and is it safe to boil Sodium Chloride in water?
Video for reference:
https://www.youtube.com/watch?v=Nqxjfp4Gi0k
https://redd.it/1ll67fe
@r_chemistry
