Applied Chemistry

Hello everyone, I have a few questions. First of all, I'm looking to melt Al2O3 in a flux in a crucible. I was wondering what would be the best combination of crucible lining and flux to do so at the lowest possible temperature. I know that it can be done in a platinum crucible quite easily but i don't exactly have 5 grand to throw down on a crucible so if anyone knows if this is possible or even theoretically possible in any less expensive apparatuses i would love to hear from you. Thanks a ton in advance.

Hey guys. I'm hoping someone here can help me out. I've been looking at my halogens and have been paying close attention to my bromine ampoule. I did some calculations and figured out that if all of the bromine vaporized, the pressure in the tube would be 99 atmospheres. heh. It would go boom pretty violently. However, what I can't seem to figure out is how to calculate the pressure present inside a tube when there is still liquid present. I.E. at about 105 degrees Fahrenheit, what would the pressure inside the bromine ampoule be? (That would be about 313.7 K). The cylinder has a total volume of about 24.333 mL, and there is about 4.5 mL of liquid bromine insid…

What do you get when you react lye (sodium hyroxide) solution with sugar? I have tried it with aluminium and got hydrogen gas which I filled balloons with and I was wondering what you get with sugar. :-)It amazes me how much fun you can get from household products:D

Hello, What does remove a solvent under high vacuum means?Does that means under reduce pressure? Do i need a vacuum pump? thanks

Can the party drug GHB be absorbed through the skin? If so can it be absorbed in significant amounts? Just read something on Reddit where a woman was given a business card that was laced with GHB and she started feeling tired and sick. Not sure how true the story is but it’s kind of scary thinking about that. I work in customer service so I’m being handed business cards all the time... Does anyone know if gettting the liquid on your hands cause you to get high? Or can the liquid/substance be absorbed through the skin and enter your bloodstream? i have 0 knowledge in chemistry

could anyone help me check these ingredients below to see whether there are any harmful skin care ingredients included ? thanks . - Aqua; Glycerin; Hydrogenated Palm glycerides; Dimethicone; - Cetearyl Alcohol; Ethylhexyl Palmitate; Sodium Cetearyl Sulfate; Propylene Glycol; - Chamomilla Recutita(Matricaria)Flower Extract; Aloe Barbadensis Leaf Juice; - Tocopheryle Acetate; Bisabolol; Phenoxyethanol; Methylparaben; Ethylparaben; - Propylparaben; Parfum(Fragrance) can anyone give me some further advice about how to tell whether the skin care cream includes any harmful ingredients ? thanks again.

hi i'm seeking to know how i can make ethylalcohol gel want to find how to make some small cash aside have gone as far as mixing ethanol with calcium acetate but the gel did not form i'm looking at making big quantities (and quality) please.

I need to calculate bars of pressure of a sparkling wine containing 3.92 gram of CO2 per liter in a sealed container at standard temperature and pressure. Please help...

Does parts mean parts by weight? A composition for example has the following: 5-15 parts A 5-15 parts B 45-75 parts C What exactly does that mean? Now let's say I have another composition where everything is given in pounds. How do I convert that to parts? For example, let's say I have a total composition of 1000 lbs with the following: 500 lbs A 400 lbs B 100 lbs C How do I convert these lbs to parts? Any help would be appreciated

flask X contains 1 dm3 of helium at 2 kPa pressure and flask Y contains 2 dm3 of neon at 1 kPa pressure. if the flasks are connected at constant temperature, what is the final pressure? any ideas on how to solve this?? -mak10

Does anyone know anything about the significance and application of unsaponified matter in oils? Does it help to protect against UV? Any other applications?

So I am trying to make a metal casing of animal paws. I am using a clay mold that I created. I have already made a casting of the print using plumbing solder (tin, copper, silver mix) This comes to about $15 a casting using 1/2 lbs of solder wire. I used a charcoal grill to heat up a copper tube to melt the solder then poured it into the cast. To make things cheaper i was wondering what I could add to the liquid metal to be a kind of filler (like using ground up aluminum foil). Or is there something else I could use that is cheaper than $30 / lbs that I would be able to melt in a charcoal fire? Also I melted the bottom of the copper tube the last casting I tried t…

Hi, I'm planning on making some concentrated ammonia solution and I'm a little confused as to the math. I plan on heating some store bought ammonia, which I already determined is 10%, and bubbling the gas through water. What I'm confused about is how to convert from w/v since the density of water changes depending on how much ammonia is dissolved. Do I need to know the density of 10% and 35% (that's saturated, right?) to figure this out? Anyways, any help is appreciated. Edit: I think some of the trouble I'm having is from wikipedia's article on ammonium hydroxide. It says "At 15.5556 °C, the density of a saturated solution is 0.88 g/mL and contain 35% ammoni…

Can anyone help me with the following: What chemical will burn a purple flame? I know potassium chloride and potassium nitrate do, however their burning point is (nitrate 631 F and chloride 1400 F). Nitrate is a hazard 1 and chloride is a hazard 2. Can someone help me find a potassium product or any other chemical that burns purple at a lower heat index and is a hazard 1?? Thank you so much for your time. Roni

Hi I would like to know how to make the following materials using HOUSEHOLD MATERIALS. After exhausting my chemistry set, (no I am not 12, ((I am 14))), which reminds me Potassium Iodide and something reacted to make an opaue black solution can you tell me what was going on there? Anyway could I have some ideas to make/buy the folowing:- HCl- Apart from being ill HNO3 HF- Dont worry I will be careful Aqua Regis- '' '' I no it is HCl and HNO3; but what quantities? Alkalie metals- How do I get the temperatures CaO- '' '' '' H2SO4- Without a car battery Cl2- Hmm I think i need i lisence but what the hell Hdrogen Cyanide- mmm ahem (shifty eyes)…

What are they? Are they really classified as a crystal species? Is there any way to make one that wont dissolve when wet? Do any crystal like the ones grow at home happen in nature besides salt?

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

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

A mix of nitric and hydrochloric acids, known as "aqua regia", is well known for being able to dissolve gold. There is, however, a different acid combination that can be used to dissolve gold, and the interesting thing about this reaction is that the gold will reappear after the dissolved solution of gold is diluted in water! This reaction, however, involves much more concentrated acids, and the procedure is much more dangerous. So I do not suggest you try this reaction unless you have a good chemistry background and know about the proper safety precautions. This post is more for information purposes. Dissolving Gold with Concentrated Nitric and Sulfuric Acids A h…

I dont think that this is the right forum, but I figured that since you have bunsen burners in the chem lab......... Anyways, I was wondering, is there anyway to attach one of those jets that are in the lab onto a mini propane tank? If so, where can i obtain a jet. I cant stand using my alcohol burner anymore, it can barely boil water. Thanks!

What material presents in greater magnitude the property of shrinkage when warm -say 25 Celsius and expand when cold -say 5 Celsius ?

Evening all. Basically my intention is to remove the oxygen from a stream of air, either cheaply or preferably with the materials I have to hand. After doing a bit of research and writing off expensive options like pyrogallol, I think I have put together a design which might work. I wonder if you might give it a once-over for me? Basically it would be a cylinder filled with steel wool and finely powdered calcium chloride, well packed and interspersed within the wool. The idea is that the calcium chloride will remove moisture from the air (a handy side-effect) and, in doing so, provide the moisture and concentrated electrolyte environment to allow the iron in the steel…

I bought a bunch of half-ripe banana. 6 days later, it still looked not ripe enough to eat, so i waited for another 3 days. It didnt change at all. I finally ran out of my patience and peeled one and took a bite. it tasted nasty and raw. what i did with the rest was to dump it. I guess the sellers put some chemical into it to make it last longer. unfortunately, it destroyed the fruit and it will never become ripe in a natural way. what is that chemical they use ? thanks.

I bet most of you know what a Non-Newtonian fluid is but for those who don't, a Non-Newtonian fluid is something that acts like a solid under pressure but other wise acts as a liquid. Here is one simple way to make a Non-Newtonian fluid: 2 parts corn starch 1 part water The thing is, that with this set of materials the product ends up being milky white in hue. My question is if any one knows how to make a see thru/translucent Non-Newtonian fluid? I would like to be able to make look as water-like as possible:cool:

I'm very interested in electrochemistry and I believe that I can learn a lot from it, but I can't even get it to work for more than a few hours. So far, I just have been using wall outlet power supplies designed to supply power to phones or what ever. These are rated 9-12 volts and 300 mA. I understand a higher amperage would be more efficient, but the power supplies heat up quickly and eventually die. This is apparently because the power supply is almost shorting out or something. Maybe... Anyhow, I'm ready to invest some money into this hobby as it has become to me, so what can I do about getting something that would stand up to what I am doing? Of course, my Dairy Que…