Applied Chemistry

Hello all. Many years ago, saw painters (overseas) using milk to prepare their something, did not pay enough attention; unsure if was for a sub-base to walls or the finish paint itself. Remember seeing a never-sanded glass-like smooth surface on walls before applying paint. Perhaps that was the intention ? How does it work, how come there is no bacterial degradation with something prepared with milk ? I do have search engines but not interested in proportions and preparation, but more on your chemical explanation part of it.

Hello new to the forum and i'm not very Laboratory literate but i was wondering if anybody on this site knows what the items in the pictures are and what is there function pertains !!! Any help would be greatly appreciated !!! Thank you for your time and consideration !!!

Hello People from science field I need Help of yours, I want to know list of chemicals (POWDER form) not liquid chemicals if react with WATER makes Strong Fizzy Action, carbon dioxide releasing is not target -- currently using sodium bicarbonate + Citric acid but require few more options - Please answer

hi there ! just would like to know if how can i correlate the existing intermolecular force between the spike glycoproteins of the coronavirus and the surfaces it may attach onto like water and wood. correct me if im wrong but im currently siding with london forces for the water-corona and dipole-dipole for the wood-water. and that’s solely based on the length of the time the virus is viable on the given surfaces by the way. im really puzzled with this one so any help would be appreciated.

I was looking up methods to create HCL and came across this video: This seems like a simple method but I was wondering about the safety of this procedure? As I understand there will be some chlorine gas released to the air in the process. How can I make sure the produced chlorine gas is within safe limits.

Recently I read about the supercomputer simulation of the 1.3 million atoms of a 10 micron aerosol droplet containing a virus particle and I realized I don't have a good intuitive understanding about how small atoms are or how many make up common items. Take for example, how many ink molecules make up a period on a page with the smallest font size? Or how many photons are being emitted from a typical computer screen pixel, How many pixels make up a single smallest white pixel against a black background? You get the idea. To continue, my laptop screen is set to the highest resolution, 1366 X 768 is 345mm X 195 mm so apparently each pixel is about 250 um square. Any…

I have mixture of paraffin wax with Fine coke and graphite dust in bulk. Now i want to extract paraffin wax alone. Could you suggest ways to extract in bulk??

Was the above question correctly stated and correctly answered? In [math]Ca^{19+}[/math], how many electron shells are there? answer is n=1,2,3,4 Then in ground state how can we found its valence electron in 6th shell or n=6? Is [math]Ca^{19+}[/math] one lectron atom?

What factors should be considered when submitting a paper to a journal in chemistry, particularly in an open-access journal?

I have about 2cc of 0.1mm particles (and smaller), some of which are flakes of placer gold but most of which are common mica. I want to separate these. A centrifuge would be useful -- if I had one, which I don't. The particles are small enough, as is my skill in the technique , that panning is suboptimal. So I'll try falling back on straight chemistry to remove the mica threads from among the gold. Short of HF, what would be good for dissolving the mica fragments? YT2095 says that heated solutions of some common hydroxides (NaOH, KOH, LiOH) will attack glass (and I'm extrapolating to hope they'll go after other silicates), but my first attempt -- glass in boil…

Hi. Those seals in medieval and later documents, is it 'wax'? Seen them in liquor bottles also. They are hard as rock. Anyone knows how to prepare a small amount for obtaining a relief pattern to yield a negative ? Should be not sticky and dry hard. Or any other plasticky modern material. -Image borrowed from the web.-

What are the conditions that favour the set of ,eg blackcurrant jelly? I assume the proportion of pectin to fluid volume is one of them. What about temperature....is that fixed? And does continuing the boil after the liquid is starting to set cause the set to deteriorate?(how fine is that judgement?) Any other parameters?

Trapped Helium, Nitrogen, Neon and Krypton gasses visually react most unoformly when placed inside an electromagnetic induction field, but they all glow in their respective colours. In order to control the colour outputted a compound e.g. copper chloride can be placed at the discharge point. Although Helium cannot bind to anything, Nitrogen can apparently bind to a boron-based molecule, so would it be possible to combine a gas with a compound to control the colour emitted when exposed to the magnetic field ?

I have been looking into the technique of extracting plant oils with CO2 gas in a controlled atmospheric environment. Usually, plants are steam distilled to extract what is known as essential oils form the plant, but this is not always possible, however with CO2 extraction it can, and with more control. The problem is that there are not a lot of commercial options available, as yet, on the market for this technique, and those which are command a higher price for the same plant. Are there any UK based CO2 extration facilities that could handle volume ?

https://phys.org/news/2021-08-secret-stradivari-violin.html New research co-authored by a Texas A&M University scientist has confirmed that renowned violin maker Antonio Stradivari and others treated their instruments with chemicals that produced their unique sound, and several of these chemicals have been identified for the first time. Joseph Nagyvary, professor emeritus of biochemistry at Texas A&M, who first proposed the theory that chemicals used in making the violins—not so much the skill of making the instrument itself—was the reason Stradivari and others, such as Guarneri del Gesu, made instruments whose sound has not been equaled in ove…

How do you make nitrocellulose that is more than 12% nitrogen and is not soluble in an alcohol-ether mixture?

Answer to g) 1756.165 kg. of coal will be required to produce the electrical energy necessary to heat the house if the efficiency in generation and distribution of electrical energy is 40%. Is this answer correct?

I read online that the kinetic energy from cold liquid hitting a high temperature dry surface dislodges protein stuck to the base of the pan, in the process known as deglazing: Is that right ?

I would like to explain what is going on here, but I don't know how: Is the steam from boiling water forcing itself out from the narrow gaps between the existing ice in the tube to force it out ?

Hello there. I've been doing a fair amount of research and the only thing which comes close is a particle detector. These however tend to focus on the toxic particles only, leaving out a lot of content. What would be required to capture a 'full' data set of an atmosphere? I'm asking this question in relation to an olfactory project, the subject of scent, about whether it would be theoretically possible to capture a certain atmosphere for the purpose of cloning it. If this is the wrong place to ask, please direct me, thank you, I wasn't sure.

Hi there As a Chemistry student I've never understood this simple idea and that's why I'm asking anyone to help knock some sense into me. So my problem is NOT how to calculate moles, my problem is understanding the difference between the moles that you calculate in a reaction, given the mass of the reactant or product and obviously calculating the relative atomic/molecular mass, and the moles that's given in a balanced reaction. To make things a bit clearer, the calculated moles of a reaction is very small, small than zero in some cases followed by many other numbers before the first significant figure, but the moles presented in a balanced reaction are usually inte…

Hello everyone, Is NBR a thermoplastic elastomer so that it can be extruded and recycled by heating or is it rather a chemical crosslinked elastomer which makes it a thermo-set polymer? Kind regards, Brecht

Hi All, This should be easy, but I can't seem to find it on the 'net. I'm trying to get my head around calculating the pH of a solution given its chemical makeup. I had hoped that starting with something easy, like water, would help me. But all the research and attempted calculations don't add up. The equilibrium equation of water is Kw mol2 dm-6 = [H3O+]mol dm-3 [OH-]mol dm-3 I'm told that Kw is 1.0 x 10-14. (Why? Where did this come from? Was it just made up because the pH scale only goes to 14??) I've calculated [H3O+] to be 19.02322 g/mol or 0.01902332 mol dm-3 and [OH-] is 17.00734 g/mol or 0.01700734 mol dm-3 First, do I have the …