Applied Chemistry

I'd like to know if anyone can point me towards a good source of these pure chemicals: tetrahydronapthalene tertiary amyl alcohol (2-methyl 2-butanol) OR tertiary butanol (2-methyl 2 propanol) Thanks in advance!

My teacher gave me a bunch of cards with fake names all with atomic weight boiling point if its a conductor & which cards it bonds with. So I need to group these. I started by putting them in order by their weight. Then I made groups by seeing which ones are non conductors semi conductors & conductors. & There's cards which form no molecules to I assume those are the ''Noble Gases'' but how can I break the groups down further by seeing who they bond with? My teacher showed me this, but I dont understand whats happening in the picture & how does it help me break down the groups. Can anyone help please? Thanks<br style="font-size: 13px; line-height: 16px;…

Interesting. here is another method for cleaning silver that you could try......from wikipedia http://www.sciencedirect.com/science/article/pii/0022508883900954 I assume it works simply by destablising the sulfide tarnish thus allowing it to be rubbed off easily. But you wouldn't want to leave the silver in it for to long as you may end up converting the black sulfide tarnish to crusty chloride deposits. This patent, found via google scholar, also indicates that ammonia is capable of converting silver sulfide to diammine silver plus free sulfurous by-product. Hence ammonia is useful for cleaning the tarnish from silverware. http://www.google.com.au/p…

where can i buy calcium oxide powder? thanks in advance to any replies

Hi. A silverware cleaning method calls for a hot solution of sodium carbonate plus a 'pinch' of common table salt; or sodium bicarbonate, or sodium hexametaphosphate, and even plain table salt alone, all in an aluminium vessel. The reaction is supposed to be " 2Al(s) + 3Ag2S(s) + 6H2O -> 6Ag(s) + 2Al2(OH)3(s) + 3H2S(aq) " But with so many choices as above, I have to think it is more a product of guessy empirism than a fine tuned fact. Any solid suggestions and optimization please ?

I am a chef by profession and love eating out and taste food outside of my own Reataurant. There is a particular Small Time restaurant I go to with my friends where they serve a lamb or chicken preparation which is extremly spicy...so spicy that you would not dare make this at home. However just one bite and you can not resist eating the whole serving given to your self. everytime I finish the meal I vow not to go back again however an irresestibale temptation comes back next day to go back.. First I thought it was my liking for food and food is really nice which takes me back to the place. However being a chef my self I know for a fact that it's humanly impossible to…

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…

How can I Dilute HCL from any concentrate HCL to any diluted HCL. e.g 38% HCL to 10% HCL. Is there any formula for HCL Dilution...?

Not sure if this is the right thread, but I was wondering if concentrated (98%) H2SO4 will degrade a HDPE container. Thanks in advance!

This is a (conceptual) engineering problem (not homework, I'm not in school anymore)... And I thought I'd entertain you all with it. Perhaps it should be moved to engineering, perhaps it should be here in applied chemistry. The problem: there is a stream of 5% glycerol ([ce] C3H8O [/ce]) and 94% water, 1% salts. The flow is 5 kg/s (large). Temperature is 99 deg Celcius. The whole stream is in the liquid phase. Pressure is atmospheric. How to obtain a clean glycerol stream from this at low cost (cost effective, glycerol is the only product of any value)? I have considered: distillation (not very elegant in this case, salt remains in the glycerol) extrac…

If i'm using a magnetic stirrer bar can/should I use boiling chips as well for maximum safety and efficiency?

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…

Hello, I'm growing some plants hydroponically and I've realized the pH is tending towards basic, while it should be in the 5.5-6.0 range. I'm wondering how I could best move it there with easily attainable chemicals, and it keep there. My previous method consisted of mostly adding in a splash of pH down solution (which I believe is just sulphuric acid) we have sitting around, then adding a splash of baking soda when I end up overshooting my target pH (I have at most 5 gallons of water in my hydroponics system so overshooting isn't very hard). Obviously, this isn't a very good method since it's very error-prone and I'm running out of pH down. My first questio…

Alright i am not entirely sure i am in the right place for this. Im like science but i am pretty much a hobbyistmore than anything. Recently i came into posession of a lot of old computers. I have been taking the boards fromt he computers and cutting them up to remove any peices that have gold plateng on them. I understand that thisis not pure gold and i also understand how very leittle gold is actually on these computers, But it adds up. Anyways, I have been following a very strict set of instructions using Hydrochloric Acid and Subzero (Nitric Acid Subsitute) to disolved the metals of the boards. This works out perfectly every time. However, Once done I add Urea to…

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

Hey guys, thought I'd post this here: http://38degrees.use...ctors?ref=title VOTE, VOTE, VOTE! To get LFTR on the road! Here is a link to an information video about LFTR technology: Get involved! For the future!

could anyone help me ? I have a research on designing the production unit of acetic anhydride (used in the manufacture of aspirin), I will be thankful if u support your reply with necessary details/ resouces and pictures or anything related to the design of this unit.

Is zinc powder just crushed zinc?

Hi Can anyone point me in the right direction for a project I'm working on I need to develop an ink which is invisible when applied to paper, but becomes permanently visible after being exposed to powerful Xenon lamp flash. The ink should remain invisble when exposed to every-day ambient light/heat. Any pointers would be gratefully received. Regards Radtanto

I've been searching around for a while now and I haven't had any luck in finding an efficient method of creating pure bromine liquid. Any help would be much appreciated.

I want to setup a simple reflux reaction where I need to heat a RBF to ~180 degrees celcius. What is the safest/most efficient way to do this? Silicone oil can't go hot enough to be used in a double boiler type setup. Would a double boiler setup with sand be a good method? Thanks for the help!

I Have NO idea Any ideas.

I am required to plate silver onto a sample with a plastic base coated with copper, followed by Nickel, then Chromium for a customer. After electrocleaning, I acid dipped in 10% H2SO4, and after plating silver, the silver layer peeled off. I tried acid dipping with 50% HCL and 25% HCL instead, but my sample ended up hazy. What should I do? (There's nothing wrong when I plate silver over nickel using 10% H2SO4)

Is it possible to take molecular hydrogen gas contained in a near vacuum, break the bonds to create free radicals, and then induce them under a magnetic field to orient their magnetic moments in a specific direction in space? Furthermore, if the previous is possible, can the atoms then be induced into a constant motion in one direction by alternating the magnetic fields? Sorry, I probably posted this in the wrong section. I should have done it in inorganic chemistry.

i'm trying to construct a highly efficient heat sink to enable heat to be tranfered 3" or so. copper is my fist choice but is cost prohibitive so i'm stuck with aluminum. i'm transfering heat from a thermoelectric module (tem) to atmosphere via natural convection. the 3" distance is a long way in thermodynamics. the engineer i've been working with suggested a pyramidal shape as the only way to go. the most economical way to make a pyramidal shape is to emulate the pyramids of the INCA'S. in effect a series of graduated plates. the copper solution is best because i could stack the plates with solder between plates and bake the entire assembly to 600f when t…