Applied Chemistry

Hey guys, How can one calculate the energy density of a LiFePO4 battery cell? Is there any way to evaluate this number precisely if one knows the amount of Lithium in each electrode? This number represents the maximum amount of energy that can be used for charging/discharging but also for other chemical reactions inside the cell or is it only the electric energy? I appreciate any answer! Paul

I am making a research about Li-Ion Batteries and I have read that Anode: Lithium intercalated graphite (LiC6) Cathode: Lithium intercalated LiCoO2 (Li„Co02) Electrolyte (Liquid): Alkyl Carbonate -I- LiPF6 [Solution of LiPF6 in a mixture of Ethylene Ofjf. Carbonate and Di methyle Carbonate (EC-DMC)] My Question is the Anode , Cathode and Electrolyte (Liquid) materials; how are they prepared by chemical reaction or by industrial technologies athor than chemical reactions? because I ma starting to doubt that cobalt and Li chemically react!

Um, I was hoping someone could help with a project I'm working on. First, I'm no chemist, although I had a basic chem class back in college, 15 years ago, I have forgotten most of it... I am Ham radio operator, and I have been working on a project for my own amusement, and because the gauntlet was thrown down . I am trying to build a radio station from the ground up. This includes the power supply, which I have decided should be batteries. I've researched batteries, and have got a basic idea down on what I want to do. The problem is, most of the information on making them rely on chemicals that are easy and cheap to find, which is all well and good. But in the …

I was reading something today and they were talking about testing a half-cell battery. If we use lithium ion batteries as an example, looking at a graphite anode how would this cell be configured? I'm not sure how a battery can operate in this "half-cell" mode. Doesn't the battery need to be balanced? I suppose the source of lithium could be the electrolyte. Thanks for your help!

I need to find the next new powerful battery where I believe that a large potential difference can be achieved! I am an electronic engineer and researching in the field of Electro-Chemistry where a new technology may appear but some should research in this area where when found a new technology would appear to replace Li existing old technology! as I believe! it can! It was believed at old times that you can make MAGIC with this science but all it needs is a little research!

Hey guys. I need your help...i'm stuck. In my free time i endulge in my hobby of restoring old japanese razors and cooking knives...it's a fun and rewarding way to give life back to quality instruments that can be used once again. I use japanese natural stones to polish them. I use them with tap water and a rubbing stone from the same piece of stone. A slurry(paste formed with water ) is raised on the surface of the stone with the rubbing stone. The razor or knife is honed in that paste on the surface of the stone. It is known that these stones bring out the steel pattern in hand forged carbon steel blades. I have researched a lot about steel…

So, I've been looking into difference cheeses and their pH levels For acid-set recipes, the use of critic acid seems very random. Some will use the powder, others will use lemon juice or vinegar; it is very random. With how varied my cheese curds have been, I have decided to look into pH related stuff. A citrate buffer is made of critic acid powder and sodium citrate, and of course water. Could I change the milk's pH level with the proper buffer? Thank you for your time and help.

So I dropped iodine than some magnesium ascorbate in the same jar of distilled water (my infection isn't going to beat itself, right?) First it went green, than it went chalk white, and didn't taste like iodine at all. So I looked up that it reacts. I would like to know ANY of the following: (1) if this is the correct forum to be asking this in, as it's for a health application (2) is the iodine, and the vitamin C still absorbable biologically? (3) is there any other common things that would cause one of these things to react like that? Cheers!

I have a question. What is the chemical composition of dirt 1st of all. Second of all, can dirt melt? And if it does melt what does it become. If it doesnt melt, why not? Thank You.

I just got a microscope for Christmas. Yay! Along with a bunch of other accessories. However, there are a few as pictured above that I am rendered clueless as to their purpose/and or names. I think the lucid one with the pump is a pipette and the needle with the white grip is a stabbing/holding needle. The other two I have not a clue. Any help would be greatly appreciated!! Thanks! XOXO Sophia

First, I'm not suggesting it's ok to dump more into landfills. I thought of the idea and question simply because it didn't make sense to me. People would say something like a television contains 5 or 8 pounds of lead, and if it's put in a landfill it destroys the environment. Of course, some lead does. Second, for the purpose of this post, I'm ignoring the existence of phosphor in the CRTs. Of course a television tube, monitor, or whatever CRT it is, contains a lot of lead. and lead is very bad for the environment, but the lead in CRTs is embedded in the glass. It's not just coated on the inside surface or something more easy to remove. If I'm wrong, please explain so…

Someone asked me about this solvent but i dont exactly what it is. He showed some videos showing that this solution can brittle an iron nail in a few seconds. I wonder what kind of Chemical Solution is it. Can anyone help me about what is it and how its made? Thank you.

I once worked in an analytic lab where we performed testing for metal concentrations using Graphite Furnace Atomic Absorption Spectrophotometry and Inductively Coupled Plasma systems. The protocols for testing were assigned, and I never received an answer to the question, 'Why was one system superior for a particular element?" We had many 'lamps' for the AAS analyses, yet sometimes the directive was to use ICP. We were testing groundwater for elemental contaminants.

Hello, I was trying to find information online about whether or not isopropyl alcohol has any fluorescent properties but haven't had much luck. From what I can tell, it seems not to. However, I have encountered an issue where I am using a fluorometer to measure aflatoxin levels and I noticed yesterday that all of my results were coming out unusually high. So today before I did some re-tests, I did a blank check of my solvents and my cleaning supplies, and the alcohol that I use for disinfecting (70% IPA) has been giving me pretty high readings. I find it hard to believe that the alcohol is actually contaminated with aflatoxins so I'm just wondering if there is somet…

Does anyone know of any reactions that are not possible, at any conditions, without a catalyst?

Hello, I'm new. I am running a STEM club with a group aged 8-10 years and we are hoping to this experiment from gsk https://www.gskscienceeducation.com/media/412926/Fighting_back_Lab_Infectionindd-1-.pdf#ga-track . I was looking to buy Universal Indicator but it seemed very expensive just for the sake of one session, so started to look for Phenolphthalein. However upon reading the safety sheet I was taken aback by all the warnings! I then noticed the same about the universal indicator. I would like to use a liquid rather than indicator strips as I just think the "effect" will be better. But I am concerned about safety issues so can someone please advise which i…

Hello! Does anybody know a way to electrochemically clean a glassy carbon rotating disk electrode? I tried polishing it with Alumina powder, but I'm still not sure if it is clean enough. Any help would be appriciated. Thanks!

That clear compound used to cover porcelain, pottery, yielding a very hard surface after the kiln process... What is it made of ? It is sold as a thick liquid ?

Hi. Is there any significant difference in quality and accuracy between reference electrode with Vycor frit (porous glass attached with heat-shrink tube) and the one equipped with ceramic frit (molten in the glass tube) like in this example https://redox.me/collections/all/products/ag-agcl-reference-electrode-70mm

I know that chlorine is volatile on its own, but when in an ionic bond with sodium, the compound isn't. However, since sodium chloride dissociates in water, and the chlorine ions are no longer bonded to sodium, is it possible for any chlorine to vaporize when boiling salt water?

Hey guys, I tried to perform the hydrogen peroxide splitting reaction that is catalysed by manganese dioxide but I noticed some really unusual results. I had a small beaker with 25 mg of 3%H2O2 and 97%H2O and added 2 1/2g chunks of manganese dioxide I obtained from splitting open a lithium battery. Everything looked fine, and I even got the hydrogen and oxygen gas into an ideal little airtight jar for my element collection. After I obtained sufficient hydrogen and oxygen and made a cool little film of the reaction I left it in a cool ventilated area to prevent the flammable gas mixture from leaking into the house. I must confess I forgot about it for 3 or so hours an…

Hi,In a water that contains manganese, iron and ammonium, I wondered what interaction they have with each other in terms of oxidation? I understand that they all oxidise but which element would oxidise first? Is it as simple as looking at the element and the shells to see which would lose an electron first?ThanksRegards,Andre

Hi All, I am new here. I hope you can help me with a question. If I were to put Mercury in a dish together with; - Ascorbic Acid (Vitamin C) or with - Zinc or with - R-ALA Would they effectively bind - as in "merge/become one [semi-]bound entity"? Thank you for any help you can offer. God bless!

Are there any scientific demonstrations or experiments using silicate compounds, such as Sodium Silicate or Aluminosilicate? Preferably ones that a quick and safe enough to perform in a classroom? Thanks

I get five litre quantities of White Vinegar (5% Acetic acid) in HDPE (High Density Polyethylene) containers and have been assured their stability for up to one year. While this is comforting, it's also not an issue as I will go through that allowance in around a single months domestic use. I would however, like to have a more practical management system and am looking into using a drinks dispenser: http://www.kilnerjar.co.uk/index.php/kilner-range/drinking.html?p=1 This container is mostly comprised of glass, and in a size that I can keep everything in one place, as now. With a tap at the bottom I avoid miss-pouring from the spout of the plastic container as ox…