Inorganic Chemistry

At what density (parts per thousand or per cent) does crystallization of sea salt start?

N2 is importint for growing crops. It is normally prodused as by product in the oil indistru ad with the Harbour process. As the air contain 70 % N2 why cant we produse it cheaper. Think about plasma reactors. Rf or ac. Is there anybody out there looking at the economics.

The question is probably quite simple for those who know chemistry on a more personal level, I do not. I have this process... Preliminary treatment of the ore or base metal byproduct with aqua regia (a mixture of hydrochloric acid, HCl, and nitric acid, HNO3) gives a solution containing complexes of gold and palladium as well as H2PtCl6. The gold is removed from this solution as a precipitate by treatment with iron chloride (FeCl2). The platinum is precipitated out as impure (NH4)2PtCl6 on treatment with NH4Cl, leaving H2PdCl4 in solution. The (NH4)2PtCl6 is burned to leave an impure platinum sponge. This can be purified by redissolving in aqua regia, removal of r…

I just extracted a lot of lithium from lithium batteries for element collecting. Any thing i can do except redox.

i have made thermite using Al and Fe2O3 and it worked beautifully but i wonder... Could i use iron chloride as the oxidising agent instead of iron oxide ?? Will this work and if so how will it be different from Fe2O3 ? Will it ignite with the same amount of heat? Will it give off the same amount of energy ? Will the colour be different ? Any dangers (aside from the dangers of the normal method) that i should know about? thnx !! Any help appreciated !!

I know that one hydrogen atom is one angstrom, but how big would it be with two oxygen atoms attached to it? There's a question on my textbook's website about it.

In my MCAT review book, it says that as the number of electrons increases, in ground state elements, the atomic radius decreases, because of increased attractiveness to the nucleus. It goes on to say that ionized atoms increase in size when electrons are added. How is this apparent contradiction reconciled?

What is the method to recover trace Cl ions in hydrofluoric acid? i have tried adding sodium carbonate before evaporation to dryness then recover using ultra pure deionised water. But the result i get is 0 recovery when i measure using ion chromatography. Please help.

If you were to take distilled water and supercool it (take the temp below the boiling point but it still remains in the liquid phase) and then if you were to attempt to drink it, would it freeze in your throat and possibly suffocate you!? Just reading a little of a chem book that I have, the thought occured to me, thought it was interesting.....

Cu (s) + Cl2 (l) Chlorine could oxidize the copper rite? I was just wondering if the products would be CuCl or CuCl2 or maybe some of both?

I've got to go to class, so I'll keep it short. Research has been done on this subject and people have said it's the most promising of alternitive energys. Automoblie companies have put millions of dollors in their own research on hydrogen engines. Bush is seeking to make hydrogen engines his formost concern in eco-politics. BMW already says they sell this cars with hydrogen engines. Economiclly, what would it take to transfer from a oil based civilization to an alternate energy source? What is the exact sciences behind hydrogen fuel cells? More Info: http://www.eren.doe.gov/RE/hydrogen_fuel_cells.html

Hey all. First post! Looks like a cool forum board, happy to be here. Anyway... ive been wondering, is it possible to obtain pure sodium from table salt (nacl)? the process ive been researching includes melting the table salt in a pan until it starts to melt. Then, electricity is applied to it in an electrolysis-like manner through 2 electrodes (copper? carbon?). At the negative electrode, sodium will gather, and at the positive electrode, chlorine should be given off as a gas (obviously shouldnt be breathed). so is this a plausible process? I am a high school student, and am new at this (chemistry) but im really interested in learning more, so i would appreciate …

i'm not exactly sure how to phrase my question but here goes. how do you identify where the charge on a molecule comes from? example OH-. if its covalently bonded, where does the negative charge comes from. is the negative charge due to O having one more electron than the protons? and what about NO2+? Thanks!

what kind of eqipmement should I use to make nitric acid. I've heard that HNO3 will dissolve rubber. Could I use cork stoppers.

I have received already baked terra cotta tile. My reading on the subject indicates the red color comes from oxidized iron in the soil. Any suggestions on a solution that would turn the red tile to yellowish-white after it has been manufactured? Out of thousand tiles we get 100 or so that are like this naturally, but no one knows how to control it. I've been told excess heat during firing can bake out the color, also iron deficient soils. But what about after it is made? Any ideas?

I have a question... I used some oxi-clean (main ingredients being sodium carbonate & sodium percarbonate) while doing the laundry. I had put some in with the liquid soap dispenser in a front loading washer. As it turns out...not all of the oxi-clean and soap was completely washed out of the dispenser and I determined that the washer feeds the water through the same compartment when it rinses. Sooo, I ended up throwing laundry that probably had some of this residue on it into my dryer because I did not know this occurred until I started a new load in the washer. What do you guys think...should this be of concern?? Thanks

Dear people, First of all: I'm just new to this forum, I hope someone can help me out with this. As an amateur rocketeer, I have quite a lot of experience with solid propellant rocket motors. I have designed and built several myself, up to a class O motor. Normally, I use potassium nitrate as oxidizer and Sorbitol as fuel/binder. The problem with this propellant, however, is it's relatively low specific impulse. Therefore, I would like to try and use ammonium nitrate as oxidizer. This chemical has the unwanted property of forming a new crystal structure at elevated temperatures, causing cracks in the propellant grain. This can be resolved by phase-stabilizing it. …

I know that N2O can be formed by decomposing ammonium nitrate or mixing sodium nitrite and hydroxylammonium chloride, but I also saw this equation on wikipedia. Does aqueous ammonium nitrate really decompose into nitrous oxide and water? NH4NO3(aq) -> N2O(g) + 2H2O(l)

do cigarettes (not custom made cigars) contain any amount of polonium??they do contain cadmium, but apart from that is there any polonium?

I decided that I would just see if this worked, I did some reasearch, and I thought that it would, but, well.... 1) I took some magnetite, Fe3O4 (30 g), put it in an Earlenmeyer Flask, and added an excess of HCl 2) Reaction did proceed very slowly, after about 20 hours the solution had turned a clear yellow color. I assume that this yielded 1 part FeCl2 and 2 parts FeCl3? (also water) 3) I then added an equal amount of Ammonium (aq) (calculated using (M1)(V1)=(M2)(V2)) 4) The solution only turned a more clear color, but there was no precipitate of Fe3O4. Am I expecting something that is not supposed to happen or did I do something wrong? PS trying to s…

I've seen many demonstrations of the reaction of sodium with chlorine, and now that i've discovered I have 3 lbs of sodium in my lab and a lecture bottle of chlorine, I will be adding it to my repertoire of demonstrations. However, it occurred to me that we ALSO have bromine and potassium, and iodine, too, for that matter. How dodgy would that be? has anyone ever seen these reactions? has anyone ever tried them themselves? Does anyone have any advice other than "be REALLY careful"?

Hello everyone, Please could someone explain something for me? When thiosulphate is oxidised, for example, in the following reaction: I2 + (2S2O3)2- -> 2I- + (S4O6)2- I know the 2 electrons have now gone to the 2 iodine atoms, but what are the individual charges of the atoms in the thiosulphate at product stage? thanks in advance Gav the only reason I ask is because in working it out, at product stage we have (2S2O3)1- + 1e-. As oxygen is 2- each, totaling 6-, and the total charge is 1-, I figured the S would have to total 5-, but that would entail one being 3+ and the other being 2+. I only thought sulphur could be 6+, 4+, 0 or 2-.

I am trying to create Nitrogen Triiodide (Iodine & Ammonia) for one of my weekly demonstrations. Is there an alternitive route I can use to do this because Iodine Crystals are very expensive. Is there another way to get or change Iodine into an Iodine Crystal?

Hi all, I was wondering if anyone knows of procedures utilized to construct LC cells with LC which are not in the liquid-crystal state at room temp. Could you perhaps also include the link of the paper where you've got this information. Also, let me know of any other sites you may be aware of where I can pose technical questions regarding this. Thank you for ze help.

Any help on this problem would be much appreciated, I really think that chemistry is pretty much the coolest thing in the world. Anyway, for extra-credit, my teacher gives a few of us students some interesting chemical problems every now and then. I am wondering if anyone would be able to help with this one. I need to know of a technique or substance--possibly hydroscopic?--that will react with water but not a halogen in order to form a solid precipitate and/or gas so that much H2O (in the problem, bromide was given as the halogen dissolved) could be then removed from the solution--and yes, it could be anything from arsenic to zirconium (obviously, neither …