Inorganic Chemistry

When you add solid NaNO2 to an acid at room temperature like dilute H2SO4, HCl or HNO3, then the stuff heavily bubbles and you get a big brown plume of NO2. This is well known: NO2(-) + H(+) ---> HNO2 2HNO2 <---> H2O + NO + NO2 If I, however, add NaNO2 to concentrated H2SO4 (98%), then no gas is produced. Even if the stuff is heated gently, hardly any gas is produced and the solid completely dissolves. The liquid becomes colorless. When I add this liquid to water, then it starts bubbling heavily and I get the well-known brown plume of NO and NO2. My question is: What happens with the nitrite ion in sulphuric acid? Why don't I get NO2 + NO? Is …

Hello everybody, I have some problems in order to count the electrons in compound using the 18th electrons rule. In the compound [(BuO)3 Mo Mo (OBu)3] I count 12 electrons (6 e- for Mo, 3 * 1e- for Metal-Metal bound, and 3 * 1e- for OBu). Is it correct? In the compound W(CO)3(P Pr3)2(H2) I count 18 electrons (6 e- for W, 3 * 2e- for CO and 2*2e- for P Pr3 and 2 for the H). Is it correct? Moreover, it exist exceptions to the 18-electron rule. Why cannot V(CO)6 dimerize? What about the compound Mo2(OSiMe3)6 and W(Me6)? Why are Metallocenes [M (C5H5)2] are only known for M = V to Ni ? I thank you very much for your help

From what I remember from my A2 chem course, phosphoric(V)acid can be formed from phosphorus pentoxide in the reaction [ce]P2O5 + 3H2 O -> 2H3PO4[/ce]. As i've been looking for a small amount of phosphoric acid, I wondered whether this reaction could be carried out at home by simply burning red phosporus to obtain the pentoxide then reacting with water? From what I have read, industrial methods involve dissolving the pentoxide in dilute phosphoric acid not water which suggest that the reaction my be slightly violent so I'm a little wary. Anyway do you think this would work or is there a simpler/safer method to obtain the acid? EDIT: this should probably b…

In some of the websites I found some of the rockets that were made of phosphorus.....Can i make rockets using phosphorus too??

Does anybody have a good resource (preferably online) that has efficient experiments to determine the identity and concentration of salts? Basically I have to perform the quintessential 'white powder' experiment, but I am uncertain about which experiments to perform. Much obliged, Teve

Hello, 1.May anyone explain why at higher temperature, the excited electrons can settle at a higher energy level? 2.What does the radial probability mean? Meaning the probability of finding an electron at a specific distance from the nucleus or an electron of a particular orbital. 3. Why does Lithium ion have more energy level than hydrogen atom ? And isn't it that hydrogen atom have all the energy levels from n=1 to n=infinity? 4.Orbitals of a particular sub-shell do not possess identical energy only when they are under magnetic field, right? And generally, the orbitals of the same sub-shell have the same properties, doesn't them? Thank you for your kind attenti…

I came across a formula for Nitroglycerine in a book. The directions said I could use Potassium Nitrate instead of Nitric Acid, could I do this with Sodium Hydroxide and all Nitrating Process? BTW: I'm not making Nitroglycerine, and this process obviously uses Sulfuric Acid.

Does ANYONE know how to solve this Heat of Vaporization problem? My teacher is HORRIBLE, we haven't really learned any of this, and she gives it to us. and I'm completely lost. If you can, can you walk me through the problem? Problem: A chunk of sodium metal is cautiously dropped into a mixture of 50.0g of water and 50.0g of ice, both at 0 degrees C. The reaction is: 2Na(s) + 2H20(l) --> 2NaOH(aq) + H2(g) Enthalpy: -368 kJ Will the ice melt? Assuming that the final mixture has a specific heat capacity of 4.18 J/g C, calculate the final temperature. The enthalpy of fusion for ice is 6.02 kJ/mol

I`ve just crystalised a batch of Strontium Nitrate, but instead of Cubic crystals, I have an equal amount of Hexagonal ones too, and a few are even Rhombic like a pair of square based pyramids stuck together at the base? now on a burn test (the dried filter paper) there didn`t apear to be any color contamination. so it there Any explaination for this?

I have some yttrium metal, which is supposed to be quite pure. I dissolved some of this metal in dilute hydrochloric acid of known high quality (no metallic impurities in the acid). The yttrium dissolves quickly with a lot of hydrogen formation, and the resulting solution is light yellow. I suspected an impurity in the yttrium of iron. That would give a yellow color in the dilute acid, due to formation of yellow iron (III) / chloride complex. But on addition of some reagent for iron (III), yellow prussiate of potash, the liquid does not become blue. With iron (III) present, such that it colors the liquid visibly yellow, a thick dark blue precipitate would be formed. I…

if you ignore the D block and look down the S and P groups, their Valency will be 1, 2, 3, 4, 3, 2, 1 respectively. in effect, to ballance you can have 2 of group 1 to make up 1 of any group 2 element and so forth. does the D block have such a clear rule/outline for it? Copper for instance seems to have a group 2 likeness. think: H2SO4 or NaHSO4 or Na2SO4, or MgSO4 so 2 hydrogens or 1 Hydrogen and 1 sodium or even 2 sodiums will bond nicely with the SO4 and the Mg (a group 2) needs on 1 to bond with the SO4. as does Copper in CuSO4. only this isn`t always the case for Copper, there`s Copper (II) or (I) etc.. so how is this all worked out for the …

Just out of interest does any body know what the law is over the possession of uranium rocks and objects such as radium painted clock-hands UK? I know that they are freely available through companies like united nuclear in the US but they don't seem to appear anywhere in this country. Can anyone provide an explanation?

I would never have thought it possible if I hadn`t seen it with my own eyes this morning! I`m allowing a saturated soln of Ammonium Nitrate to evaporate under a fan blowing cold air. there a long (5+ inches) crystals formed in this soln, as eventualy the crystals start to form like frost up the sides of the evap dish, I normaly try to lift the existing crystals up in to the aur for better evap. as I did so they bent I can take a long single crystal and slowly bend it into a loop, How is this possible!? I urge anyone with a large enough amount of AN to try this themselves, there`s nothing wasted as when it`s dry you get your AN back.

I started with a couple 100g of technical grade Barium Carbonate, so I`m making a variety of different salts with it of a greater purity for use later. I have the Chloride, that stuff`s fine. I have the Chlorate, but over time the pure clear crystals seem to turn white and go to powder? today Im making the Nitrate, and I`ve noticed that I end up with a ppt almost half the same amount of the barium cabonate I`ve added? this didn`t happen when it was added to HCl, only a Tiny amount didn`t dissolve. I`m using 20% Nitric so I don`t think it`s a solubility issue, any ideas?

help me plz!!!

I recently bought a bottle of rust remover/cleaner.. Its called Phosphoric Prep & Etch.. The only thing under contents says it contains phosphoric acid. It is a dark green liquid, a little oilly. Any ideas on how to get the phosphoric acid out of this? Ive heard of green phophoric before but i have never seen it. I could boil it to get the water out, but phosphoric acid has a low boiling point doesnt it? Any ideas would really help thanks.

The following webpage describes an experiment I did with electrolysis of a solution of NaCl and KI with a copper wire as cathode, and a little plasma beam as anode. This is a very special experiment, which I want to share with you. If you want to repeat this experiment, be VERY careful. It is a dangerous experiment, and should only be performed if you really feel confident that you safely can do this. I also had a small accident, which was quite painful (droplets of water and salt hitting the skin at very high speed). The experiment can be seen here: http://woelen.scheikunde.net/science/chem/exps/HV_electrolysis/index.html No need to fear that k3wls will …

Okay way back when I was a little kid I put a penny in some vinegar. Later some blue crystals formed. Is this copper acetate? probably copper(II) acetate hydrate? thanks that's about it.

I'm not scientifically inclined so please be patient with me! I make home-made soap with lye. I bought some drain cleaner which said 100% lye on the bottle. I've made many soaps with this but recently got suspicious when other soapmakers said their bottles of this particular brand of lye was pure white - mine was grayish and had bits of 'junk' in it. I wrote the company and they told me it was 100% lye and nothing else. Today I bought some more, opened the bottle and found it was TOTALLY DIFFERENT from those last bottles I bought earlier. From what I can gather in internet searches, this company used to sell this drain cleaner with other ingredients added …

I am looking for a grad student in chemistry or chemical engineering, preferably in southern California, to help me with purification of 95% ethanol. Please contact me directly. Rob Daniel XXXrdaniel2YYY@YYYsbcglobalXXX.ZZZnetZZZ MOD EDIT: Modified email address. Leave out XXX, YYY, ZZZ. It is not smart to post plain email addresses. Besides a few mails from SFN-members you may also expect tons of mails from porn-suppliers, crackz and warez sites, leather and SM suppliers, etc. etc.

Would anyone know what are the ideal widely available and cheap inorganic compounds to double decompose CaSO4 and MgSO4 into their more water soluble counterparts. Please note that the sulfates of Calcium and Magnesium themselves are insoluble in water. The other inorganic compounds and their Sulfates have to be soluble in water. Any such compounds ?

man made included.

If any of you have any ideas about extracting or obtaining Tin metal here`s the place to discuss it. I have one, it involves using 60/40 Tin/Lead solder, melt it untill all the solder flux has burned off, then dissolve it in acid, from there simple displacement should provide the Tin, or at least that`s the plan. on the electromotive series, does anyone know which comes 1`st Tin or Lead in reactivity? or can improve upon my method at all? I only need half a gram or so, so the whole thing can be done in a test tube quite easily and no fancy equipment is needed. Ideas Welcome

How would you make a Neutrino, or how is a Neutrino made?

I did some experiments with the metal iridium. I have some iridium salt and did some experiments with that, which I want to share over here. This metal indeed is worth its name. With only very simple chemicals you can reach all colors of the rainbow, really neat. Have a look at the following web page. http://woelen.scheikunde.net/science/chem/exps/iridium/index.html