Applied Chemistry

Anyone know of a chemical that burns at such a low temperature as to not burn you so you could quite literally set yourself alight. Don't worry i'm not planning anything of the sort but I just heard some talking about something similar. Anyone know what it is if it actually exists?

Hey there, I'm investigating the decomposition of hydrogen peroxide and, after attempting to write the plan up, realised I have quite a lot of questions. ^^; 1. How are gases that spontaneously decompose stored? (stupid question I know) 2. I'm expected to investigate the use of inhibitors and buffer solutions, but beyond simply using them then not using them, how would I get a large range of data? Is it possible in this case to use varying amounts? 3. I'm meant to be using yeast as a catalyst, I know it's not used up in the process but I'm still not sure how much of the solution I should be using in comparison with the amount of hydrogen peroxide. Any suggestions? …

ok, the question is: Calculate Km and Vmax for the enzyme reaction with data as below WITHOUT using a graphical method. (10 marks). So all the data they have given is a 2 column table, time values that increase from 0 to 4.89(like 0, 0.052449965, 0.104970974, 0.157565146..etc) and the other column has concentration values that decreases from 70 to 1 (like 70, 69, 68, 67, 66..etc). i beleive this is the substrate conc. but i hav no idea, they wont tell me the concentration of what it is..maybe substrate, i have no idea. so how do i calculate Km and Vmax for this without using a graphical method. what equations shud i use? at least give me the answer ill try to work…

If you want an alloy of say iron, manganese, phosphor, and germanium; do you melt them with desired proportions in a very, very hot 'blender' and push the 'on' button for a while ? Or is it more rocket science than that ?

I'm looking for suggestions on acetic anhydride productions at home. Maybe a way of making a home made ketene lamp? I don't have an extensive knowledge of chemistry and this makes the most sense to me.

i took an aluminum tube, 1/4 inch dia. and 2' in length, filled it with KNO3+sugar+sulfer at a ratio of 63:27:10, made a nozzle with some putty stuff that i had, and then i took a BBQ scure and stuck it down the middle, forming a cone shaped core. my experience with this type of rocket building is limited, so i had no idea how the rocket motor would perform. i straped it to my homemade scale(regular scale with an aluminum V spot welded to it, and a hose clamp attached. so i threw it into the hose clamp. due to its length i figured it would probably get in the 5+ second range for burn time...well, i clocked it at 6.35 seconds of burn time, and get THIS, 14LBS PEAK THRUST!!…

I would like to know some cool easy experiments i could do. I have a large assortment of chemicals and lab equipent. Stuff id like to do is synthesis (of simple stuff even) precip. reactions, things like making gases, making color chagimg reactions, etc. Pretty much any hobby-chemiust should kno wat i mean. Thx for the infoooo

Greetings, After searching every store I could I finally came across a source for sulphuric acid in the form of drain cleaner. I was pleasantly surprised to discover (thanks to the online MSDS) that it's 94% sulphuric acid. Unfortunately the "12 buffers" added appear rather effective, making a few drops incapable of harming a cardboard box. Clearly I need to purify it, but I'm not entirely sure how. After asking on the IRC (thanks UnintentionalChaos and Nitric) I learned that I should do something along the lines of adding activated charcoal to it, filtering it through fiberglass, and then concentrating to make up for any water gained in the above steps. …

I know I already started another electrochemistry-related thread, but this one is about a slightly separate subject. I was looking to use water electrolysis to yield hydrogen and oxygen in separate containers. For the most part, I think I'd know what I'm doing, but there's some things I'd like to check on. First off, what would be a good (ie. safe and/or efficient) electrolyte to use for at-home electrolysis? I'm guessing that the electrolyte itself would undergo electrolysis as well... which is why I'm hesitant to use table salt, as that would supposedly yield chlorine gas. (Inside the same container as oxygen, I presume?) So far I'm considering baking soda, or vineg…

how a match stick can auto egnite only placing it on 2-3 inches of distance with chemical. I have a reference video. can anybody tell what chemical is being applied on paper in this video ? can someone explain this video ?

I wanted to know how catalysts work. My teachesr just said that it lowers the activation energy of a reaction, so that the bonds are looser, and according to the simple collision theory, molecules are able to have more successful collisions. All this is well, but a little more detail as to how the activation energy is lowered would be helpful. Is there any formula based method or any other that can identify a catalyst for a reaction, or do you haver to find out by trial and error? I am under the impression that catalysation has something to do with the catalyst's surface area. If so, for example in the case of the catalytic breakdown of Hydrogen Peroxide, say manganes…

I have been confused with this for a very long time and still havent found an answer to it...does the KNO3 make it easier for the sugar to burn ? I am not very sure... So can the pros here help me out?Thanks.. Another thing is that whether can I find another easily obtainable chemical in place of the KNO3? This is because KNO3 is very hard to get in my country(Singapore).. Yes there are alot of pharmacies here, but none of them sell chemicals at all...

Hi. Looking for the glossiest finish spray paint can; buying several brands and trying/comparing would be the only way to judge them; but there is a place that fills spray cans with the paint of customer's choice. What compound determines gloss, in order to ask for extra of that when filling ? -No clear coats later-

What are the important differences in use interchangeability among coal, carbon, charcoal, graphite ? As to be used in a battery cell electrode; would a rod made of reasonably pure (~85%) 'natural' coal behave like a carbon rod ? Question 2 : Seen chinese machinery manufacturers advertising extruders to make rods and hollow rods from coal/charcoal. What is the main use for such product ? Is it used in USA ? ----> www.alibaba.com/showroom/coal-rods-extruder.html

Would anyone help solve my questions? 1.Are all polyatomic ions have covalent bonds(the electrostatic forces between the shared electrons and bonded atoms)? 2.Are they covalent compound? 3.Like ammonium(NH4), how does it exist? 4.Why aren't they have 0 charged? 5.How to estimate the charge of them?

I want to make a multilayer coating on Si-wafer using RF magnetron sputtering. My targets will be Cu, Al, Ti (in sequence from the top) and my machine capability is only one target per sputtering process. So i assume a problem will arise on aluminum layer because i'm certainly sure that the oxide layer will instantly formed as soon as i open the chamber to change the target for the next layer. I do some study and found that the oxide layer is strongly bonded and have a porous structure. My first idea is to put a negative bias and back-sputter the Al film before proceeding to Cu layer. But i don't know how much energy should the Ions (Ar+) have to clean out the oxide layer…

I grow bismuth crystals to make sculpture and jewelry. Every time I melt, I lose a bit to oxygen on the surface. I've collected enough slag to prompt the question. Can I reduce this efficiently to offset my $22 per lb for the new stuff? Thanks for considering my problem. Ernie

1)KMnO4+H2SO4+Na2SO3 -> Mn+2+SO4-2 2)KMnO4+NaOH+Na2SO3->Mn(OH)2+SO4-2 3)K2C2O4+H2SO4+Na2SO3->Cr+3 +SO4-2 4)K2C2O4+NaOH+ Na2SO3->CO4-2+SO4-2 5)K2CrO4+H2SO4+Na2SO3->Cr+3+SO4-2 6)K2CrO4+NaOH+Na2SO3->Cr2O7-2+SO4-2 Does anyone know how to balance these equations? I know you have to add some things from the left side to the right but i dont know what. Please help!

Ok, so I read other posts on using epsom salt as an electrolyte, and copper electrodes with 9v to create copper sulfate. This method apparently worked for some people, but my water isn't blue, it's yellow. I tried to think of anything that's yellow, and came to sulfur. It's a really fine yellow powder suspended in the solution, and I'm not sure what it is. I'd sniff it, but that doesn't seem very wise. Any ideas? Thanks:-) I just touched it, to see if any temperature change had occurred, and it feel slightly warm, compared to the copper/water mixture I have sitting next to it in an identical container.

I'm trying to make a piece of home-made jewelry, unfortunately it's been a few years since I last took a chemistry course (or did anything chemistry-related for that matter). My goal is to electroplate some silver writing onto a copper ring I have. I was wondering: - What is the easiest, cheapest way to get some silver nitrate, and how much would I need to plate something that has ~1cm squared surface area? - Does oxidized copper electroplate as well as pure copper? i.e. would I be able to oxidize the ring, carve something through the oxidation, electroplate the desired area with silver, then sand off the oxidation? Thanks.

Hi there this is my first thread in this forum, firstly thank you all very much. one time i read about making kno3 from (manure,dirt,ashes,..etc) and i have found the way in this forum before i enjoy it, but the way was so difficult for me because the steps of it have no explain it was so simplified(too short) so of course i have too many mistakes, the thing i need from you friends to explain this way for me more and more and if you can add some pics,or something else, or to find me this way on a good website and with a good explaning and to be easy to do... i attached the file that i got from this forum in the past but it is not explain everything, you will find some…

I am trying to create some benedict's solution. The ingredients: Copper(II)Sulfate: Created with copper and sulfuric acid. as described here http://www.scienceforums.net/forum/showthread.php?t=10342 Sodium Carbonate: Help! how should I get this? Sodium Citrate: Help! how should I get this? Sodium Citrate dihydrate After All Ingredients are gathered I found this from searching on the internet. But I am having a little bit of trouble understanding this. When they say 173 g of "sodium citrate dihydrate" would this include the mass of 2 H2O molecules with each molecule of Sodium citrate dihydrate? and when thay say "17.3 g copper sulfate p…

Well, Xmas is over, and predictably, we have a huge surplus of styrofoam packing peanuts. I'm pretty sure the local recycling pickup only covers paper, glass, and metal, but I don't want to waste huge amounts of trash space on these things. I recall seeing an episode of Mr. Wizard as a kid where he dissolved them in acetone, leaving only a small residue. So, am I remembering this right? And what will the residue be? Is it just depolymerizing it, or is there a chemical reaction beyond that? Would the residue be safe to throw out? Mokele

well... we need to do some sort of project work on the topic household chemistry... it includes experiments, reports, investigation etc... i wanna get some new ideas... which means those hven't been done by someone else... not those common ones i mean... n better hv some actual applications, it may not be a well developed one tho... em... any ideas? =)

I bought some non-woven polypropylene bags online. It smells bad. my mom says it smells of nasty chemical. is it toxic and harmful to our health ? why it still smells bad after i opened and put it near windows for 2 days ? https://www.answers.com/Q/What_is_nonwoven_Polypropylene Polypropylene is the most common form of synthetic material used.It is used in almost every thing we use. Though previously declared safe, recent searches reveal that polypropylene may release two highly toxic substances, quaternary ammonium biocides and oleamide. (i have some problem uploading pictures)