Chemistry

Does anyone know of any (widely/commercially available) plastics that exhibit 'fully'-permeable properties? That is the plastic would allow small molecules to move freely in and out (water, carbon dioxide, oxygen, nitrate etc.), but prevent viruses, bacteria etc. from entering? I believe it would need to have mesoporous/nanoporous properties. Can't find anything online! Perhaps what I'm looking for doesn't exist. Basically i'm going through preliminary research for my MSc thesis that i'll be undertaking in summer. I'm looking for a material that could contain a marine microalgae culture whilst allowing water, carbon dioxide, oxygen,nutrients and waste in and out of th…

Hi. I am a beginner in HER and OER and I was wondering if I could be directed to some relevant papers and study materials. Thanks

Hey guys, I have just uploaded my first compilation video and I hope if you could check it out and give me some feedback on it? I would really appreciate it! Thank you in advance. (: LINK DELETED

Hi, im a student, and i need to conduct a research on anything chemistry related. i am interested in electrochemistry, so i thought of doing the affects of different currents to the electrolysis of copper sulphate solution. however, my teacher thought that it was too simple and i should find maybe something that i can extract copper sulphate from to get marks on the personal engagement part. do anyone have any ideas on how i can make this experiment 'a lil bit complex'? or do you have any ideas for my chemistry research relating to chemistry? thank you so much

Good evening everyone, I'm here with a weird question about the explosion under water of a mixture of explosive gases. To cut under water the divers use among other equipment mini thermal electrodes that work a bit like a welding electrode, except that these thermal electrodes are hollow to allow the sending of pure oxygen. By electrolysis effect as well as by the heat of the flame (+/- 5500 ° C) the water decomposes into hydrogen and oxygen. For commercial divers, the formation of such gas mixture sometimes presents a lethal risk if it cannot escape freely on the surface. If I am not mistaken, in theory the explosive limit of this H2 / O2 mixture is between 3.9 and 95.8%…

I have a question that I need help finding the answer to so here goes. When I did chemistry at school back in the early 80's, we were taught about using sacrificial anodes on pipelines etc and as an experiment, I volunteered to take a strip of zinc home and crudely soldered it to a 6" steel nail via a short length of wire and was asked to bury it in the ground for a period of time. When I dug it up some months later, the obvious had happened and I took it back to class to show everyone and much their amazement, the nail showed no sign of rust. Now, I've just installed a steel universal beam as part of an extension to my kitchen and being over enthusiastic, didn'…

So I had a jarring incident happen in my bathroom. I notice the toilet tank lid was getting a bit dirty and had blue listerine rings on it. So I carefully picked it up off the tank (because it was cut at one end due to a oversized sink) and put it in the tub after I cleared it off since I kind of use it for storage space. The following items were on the tank lid, a bottle of the works toilet bowl cleaner, listerine mouth wash, epsom salt and goldbond spray. I sat these on the side of the tub or in the sink. on the tub was a bottle of tilex (i really lack storage room) well i turned on the water and POP! I saw a flash and heard a Loud Pop like an electrical wire fell …

Hello, new to the forum here, glad to have found it, looks like a great place in which I look forward to contributing a bit and reading a ton! I've recently purchased the entire contents of an older biotechnology lab, which will surely supply much fodder for posts in the coming months. I appreciate all types of science, but I'm a fisheries biologist whose lab experience doesn't typically go much beyond dissection kits and light microscopes. My plan is to sell some of the equipment to recover my expenditures, keep some neat stuff for myself, donate some to local schools and 'maker spaces', etc. The first thing I'm dealing with is a fair amount of glassware, probably a…

Hello everyone, I've been trying to find a way to obtain elemental boron, and the idea of thermite interested me. Because who doesn't enjoy fire? For my boron source, I plan to use boric oxide (B2O3). But have been toying with the oxidizer.I know I could easily just use aluminum powder or magnesium powder, but I had some manganese powder laying around and it made me wonder if it could be used in the thermite reaction. Manganese as an oxide (Mn2O3) is a great reducer for thermites but as the metal? I would love to hear what anyone thinks about this topic. Thanks

Hi Everyone Lets say there is a container which contains 50g of oil floating on top of 50g of water. What is the minimum amount of washing-up liquid needed in order to fully and permanently emulsify the oil and water? Thank you very much. Kind regards Tim

Hi Everyone I know that if erythritol is added to hot molten coco butter and mixed in so that the erythritol melts into the coco butter, the erythritol can then separate from the coco butter and recrystalize as the mixture cools. Would the emulsifier lecithin stop this separation and crystalization if it was mixed into the mixture? Thank you very much. Kind regards Tim

Hi (Excuse me if my English is not good and please reply with simple english) I want to buy a Water pump for my house (drinking water) There are three types of pump impeller. Bakelite, Noryl and brass Brass is more expensive but Noryl is louder and cheaper. My Question: Is Noryl Impeller sanitary and isn't Carcinogenic in the long run and approved by the relevant organizations (Being healthy and safe) Thanks

Hello everyone I'm afraid I don't really get some things in 'chemical equilibrium': My book first states that if the equilibrium constant K is big, there's a big conversion from left side to right side (the equilibrium is right). It also states that if a concentration [A] is being increased, the equilibrium is being shifted towards the side of A. Now, it states at the equilibrium reaction [math]H_2+I_2\leftrightarrow 2 HI[/math] that a doubling of [H2] will shift the equilibrium to the right. However: [math]K=\frac{[HI]^2}{[H_2][i_2]}[/math], making K smaller when [H2] is being enlarged, shifting the equilibrium to the left (K is smaller, so the reacti…

Hi, I wanted to know... Can I make Carnelian (SiO2) By burning silicon at my house? THX

There are a number of factors in whether or not a particular reaction will occur between chemicals, and/or the extent to which it will. An introductory course in chemistry, even at the university level, goes into Gibbs energy, but never goes so far as to say whether or not it's adequate to predict whether or not any given reaction will occur. (If I had my time back, I'd have asked, but as an undergraduate I was only concerned with getting through it.) Does whether or not a spontaneous reaction will occur depend solely upon the Gibbs energy and activation barrier? Is there software out there that can predict for us the reactions between any combinations of chem…

I noticed that borax is naturally occuring in salt lake beds that regularily dry up and then refill. Google was useless so Im asking here, if I took salt,dumped it in a pot of water, boiled the water away, then refilled and repeated, would I eventually wind up with borax?

For making of fragrance which volatile oil is unique as base oil?

How to decrease smell of essential oils.

I have a quick question for anyone who may be able to help... I apologies in advance if this post is in the wrong place... I have been tasked with designing a new logo for a large(ish) company. The word ION is prominent in the company name, so they have asked to incorporate an ion symbol of some sort within the logo. Not a problem so far... However, they have also asked (although the word is spelt Ion they pronounce it Iron) if I can include some form of Iron, to signify strength. So my question is, could I include II or III somewhere within the logo as a nod to both Ion and Iron? If so, which one is the most common and/or 'strongest'? II, III or even…

Lest say we have a water solution made of 50 g of NaCl and 50 g KBr. We evaporate solvent. What will crystalise? Is it possible to know/calculate on for this kind of examples? Thanks advertising removed

I cant find the mechanism of the state solid synthesis of LiMn2O4 in literacy. Starting from Lithium Acetate and Manganese Acetate (acquired from brumer), I found the general equation quite easily: Li(Ac) + 2 Mn(Ac)2 + 43/4 O2 --> LiMn2O4 + 10 CO2 + 15/2 H20. I can't find a mechanism of this reaction. I know Mn is oxidized and Li keeps its oxidation state. Is Mn304 a precursor in this reaction ? Is Mn2O3 a by-product ?

When I dissolve tin in aqua regia, it reacts quite quickly. Soon after the reaction, if the stannous chloride (from brumer) is brought to a boil, the salt will boil for some time, and then all of a sudden, it boils uncontrollably. It escapes the beaker in the process. Please someone explain what reaction is occurring here? Is there a way to avoid this reaction?

I am currently using a release agent for polyurethane resin moulded parts. The release agent is a solution of silicone in Heptane, Petroleum Naptha and an Aliphatic Solvent which i got from brumer. Please advise a solvent that would remove the silicone residue from the finished moulded part? Someone suggested Alkaline products but they have had limited success in removing the release agent. Please let me know what i could use.

Hydroxide or OH-, is a common base that's used quite often in the teaching and practical use of chemistry. It is found in many compounds and molecules but there is one thing that bothers me. So if you were to look at the formal charge of a hydroxide molecule, you'll see that there are 6 lone electrons on the oxygen with also a shared electron between the oxygen and the hydrogen. Is this specific molecule formed through the auto-ionization of water? You know where a H20 molecule breaks into OH- and H+. It creates a proton which would make sense if it left its electron for the hydroxide. But then the appearance of OH- in compounds is.. odd. For example in benzoic acid, a hy…

How can make nonpolar oils to polar for mixing with alcohol (ethanol)?