Applied Chemistry

I am confused! would you like tell me which one?

I recently made up some silica gel, and I inadvertently allowed the beaker to dry without cleaning it thoroughly. So now there are traces of it on the glass, and they're proving a right bugger to get out. I don't think anything short of hydrofluoric acid is going to touch it chemically, and that wouldn't be such a good idea in a glass beaker anyway. Any suggestions for getting the last traces out? TIA..

I need help finding a way to do this for my schools float after inflating it with compressed air a sort of glue or cement that only hardens at a low tempurature would be fine but it needs to harden quickly Edit: can anyone PLEASSSE HELP ME?????

I need to know what explosive I could use to quickly inflate and stretch about 15 feet of surgical tubing (its for the menchville football team's float). Could you not give me a formula for the explosive because I only need the name of it. The explosive must be legal for civilians to use.

I'm sure this has been asked NA times, but I haven't been able to find a clear answer -- just bits and pieces as parts of larger discussions. My chemistry classes are many years in the past now, so I might not even be asking sensible questions. However.. I'm looking for formulae relating concentrations, pH, and molarity to each other, for strong acids/bases. For example, I have here a bottle of industrial H2SO4 for which the MSDS claims the 'Hazardous Components: Sulfuric Acid 93.2%'. Is it safe to assume that's w/w? Presuming the other 6.8% is water, how can I determine the molarity and pH? Thanks in advance..

Hello all. Many years ago, I used the services of a guy that removed all the glass from my car (except front windshield), and dyed them smoky bronze. His explanation consisted in carefully pouring (not spraying) his 'magic' recipe on the inside surface, kept the glass at an angle to let the excess drip and took a few hours to dry. Yielded an optically clear and smooth, scratch resistant hard finish. No bubbles, no streaks, no voids, highly wetting/bonding It may had an unintended -or intended- bonus of blocking IR. What would you suggest to do such, mixing some automotive clear coat with what dye/ink or something else ? Would proper spraying work well too ? …

I was wondering if anyone could tell me the list of chemicals used in the process of through hole plating. I have heard that there are almost 7 chemicals used for this process. Something called activator etc. I would be very thankful for this information, as I usually have to make PCBs and our fabricator has no setup for through hole plating, hence the PCBs are only single sided.

The water-fueled car is often the basis of stupid perpetual motion schemes. Typically this involves some sort of wacky electrolysis device, ones which are claimed to somehow release hydrogen in a way that has a positive net energy output. After all, that's the only way a car could run on water, right? Well, there's another way. Rather than using an electrical reaction, you can use a chemical reaction. In this case, with boron: http://environment.newscientist.com/channel/earth/energy-fuels/mg19125621.200 The basic idea: fill your car with water... and boron. The boron reacts with the water to produce boron oxide and hydrogen gas. The hydrogen gas can then…

I have some finely-divided iron disulfide, possibly mixed with some other things, that I wish to 'dissolve' away -- or at any rate remove from the mix. What would be a good way of doing this using fairly safe chemicals? (I.e., not concentrated nitric acid, although H2SO4 or HCl are possible.) Among the things that may be left behind are SiO2 and microscopic amounts of gold, neither of which I'm concerned about being affected by the solvents. If I heat FeS2, won't it break down and leave me with elemental Fe and SO2? If so, perhaps then I could act directly on the iron and make it into a soluble compound that could be dissolved and washed away..

does anyone know a way to make somthing a bit more energetic that KNO3+C6H12O6, but less involed than making nitrocelulose, curently i only have potassium nitrate, silver nitrate, and calcium carbide thanks for any help

hello to investigate the percentage of purity of iron i iron tablets what else would i have to do apart from titration and colorimtery? Also, how could i investigate effectiveness of sunscreen aginast UV? Lastly, how could i briefly investigate the conc of caffeine in diff coffee brands? I am desparate for help and would rly appreciate it asap! Thanks

Does anyone know any substances that reflect all artificial light and can be applied to human tissue safely. I am a doctor and we are in need of such a chemical to conduct a study to look at the effects of artificial light on human tissue. Any pointers will be grately appreciated. Many thanks Jack

It is a hot day in Denmark. Some people enjoys it, and some people just wants to cast a curse on days like those. I had been outside in the beautiful nature and now I am enjoing a fresh cold pepsi max cola. The warm day also means that I have sweat a lot. My skin has a taste of salt of course, however I wonder why the foam in my cola disappears faster than normal when I touch it with my salty fingers. Could someone explain what happens and why when I touch the foam? I have a basis knowledge of the structur of foam.

Hi. Is there any reaction or chain of reactions to obtain any alcohol (propanol, isopropyl, metanol, butanol ...) from calcium carbonate ? Miguel

Hi. What compound would be the most convenient to mix with mortar to expand it to a very lightweight pumice type end product with non-toxic microbubbles? I say micro because I believe that if the bubbles are somewhat large, would surface too easily before the cement cures. Thanks, Miguel

I need to know of possiable methods for the determination of the quanity of blood in a mixed waste stream (industrial waste from a meat food processing plant). Ideas of the top of my head would be to measure Fe and TKN and find out the ratio of iron to nitrogen of the particular species that is contributaing the most blood Does anyone know where I can get a protein seqence of hemeoglobin for particular species eg ovine, bovine Would there be any other easier or better methods to do this say like some ort of immuno assay. Your ideas and feed back will be very much appreciated.

Yesterday, I found Auerbach's Wilderness Medicine text, which is aimed towards producing effective medical professionals when in the outdoors-- past the confines of the hospital or university lab. So, whether the doc is in the forest, or in the middle of the corporate jungle, ideally some action could be taken to improve the well-being of the sickly, diseased, or injured. Are there any books on wilderness chemistry? Not only would it be important to be able to check what elements make up potential food, but to show friends neat little tricks by quickly picking up dirt and a nearby miscellaneous object to ignite it, or show other cool phenomena, as well as the importan…

Hey Could anyone help me out with identifying all the intermolecular forces within a heroin molecule? I’m pretty sure its mainly van der waals but if i could get some clarification on how exactly they are working, what functional groups and ions are causing them would be a great help Thankyou very much. here's a heroin molecule (link) http://en.wikipedia.org/wiki/Heroin

I need to know if 90% nitric acid will dessolve my aluminum tubing. Does anyone have any experanice with strong HNO3 ?

Using a Oxidation Reduction Potential to asertain low level Dissolve Oxygen I have read somewhere that the relationship is linear. can anyone expand on this as to the formula etc how high of a ORP would you expect to see before a positive DO reading in a aerobic waste water pond

Now i've read that if you stick yeast in apple juice and let it ferment it creates an alcoholic drink(not that tasty but works). I started doing this and im just wondering if it actually works.

Hello Everyone, This is my first post here so first I'd like to say hello to everyone here. I work at a preclincal testing facility and have recently been charged with the task of coming up with differnt methods of sampling based on the different physical properties of the test article. In most cases the formulation is a liquid, or a liquid suspension. So my question is does any body have some methods they'd like to share. I just learned some new ones today but I'd like to hear some other methods as well. thanks Nick

Back in 1997 exterior seating was built outside a building in Canberra, Australia. It was built onto a hip high concrete block wall which ran within a few degrees of North-South. The seat was on the eastern side and a line of trees sheltered it from the western sun in the afternoons. The seat was hardwood timber, perhaps 45mm thick, 120mm wide, really solid stuff, supported by steel brackets underneath. The brackets were fixed to the timber by heavy screws, from below, these did not reach the top surface of the timber. The brackets were just visible from a distance if you looked hard enough. From close up they were not visible except through the gaps between th…

Lets say you collected a sample and you knew it had Aluminium Sulphate and Sulphuric Acid in it. You try to determine the amount of Sulphuric Acid and get a surprisingly high result. The results could be overstated because the barium perchlorate titration you used is specific to sulfate and cannot differentiate between H2SO4 or aluminium sulfate. Does anybody know of an analysis that would show the difference?? Ta

Hello, i just electrolised a solution of water and salt using a copper anode and electrode. after i had electrolised that solution, i added phenolphthalein, it turned purple, turned orange after ten minutes or so, then turned clear. does any body know what this final solution is? thanks