Inorganic Chemistry

Recently I have done quite some experimenting with copper ions and also with iron ions. Now I decided to combine the two metals and a whole bunch of new and special phenomena pops up . Many of you probably know the FeCl3.6H2O in the form of small pea-sized globules, used for etching copper from printed circuit boards. Especially when combined with some HCl it works quite well. If you add some copper to a solution of FeCl3.6H2O in conc. HCl, then the copper dissolves and the solution darkens. Most people think that the following reaction occurs: Cu + 2Fe(3+) --> Cu(2+) + 2Fe(2+) Well, I found that the real reaction is MUCH more complex! What do you …

Where is a good sourse chemistry information. Early Collage type information but not to tech .

Hey everybody.. could anybody help me with my assignment about oxygen.. Occurance, Industrial preparation, Uses, compounds of oxygen "Ozone preparation"

I have recently been experimenting with different metal reactions with different acids. Some interesting things that I have noticed: 1.)Using 3 molar nitric acid and a small mass of iron, I got a reaction which produced a dark brown substance was produced adn the iron was not completely dissolved. 2.)Also using 3 molar nitric acid and about the same mass of copper, the solution turned a light blue. None of these things happened when I used sulphuric or hydrochloric acid. Feel free to explain why these things occur or comment on them.

Is lead(II) chloride soluble in NaOH(aq)?

Hey everyone, I am looking for a site where I can download any video clips on Uranium for a power point. This can involve anything. They would need to be downloadable in a standard format though. Thanks in advance, Colin

Some have claimed (in a forum discussion ) that when the sodercommando came in and ripped off all the clothes, jewelry etc on the dead jews in the gas chamber, some smoked in the same time, and HCN is flammable, and 75 g/cm3 is enough to cause it to explode, my question is, how much more a less gas was it in the chamber when the nazis went in and ripped of the stuff from the dead bodies? i prsonally don't think it was sufficient amount to ignite it if the were smoking but i need evidence.

A while ago at school I did a lab test with luminol, or to be more exact I made a solution of: 0,2 gram luminol (C8H7N3O2) 180 ml H2O2 10 gram Na2Co3 and 180 ml of water. I had it react with blood and a piece of rusty iron. (so the Fe3+ ions those are I believe.) Now I put myself in the difficult position of having to actually write down the chemical reaction. I can't seem to figure out the reaction myself, and my friends can't really either, I've looked online but I've only found luminol solutions which use other chemicals I know in theory how chemoluminescence works but that doesn't really seem to help me. I would ask my teacher but it's weekend, and I…

I was thinking about this: as the number of electrons in atoms increases, what happens to the London dispersion forces? My reasoning is this: as the number of electrons increases along a period, the atom in question becomes smaller owing to greater attraction to the nucleus. This also makes the atom less polarizable (i.e. the electron cloud is harder to distort) and so the London dispersion forces weaken along a period. Only if the increase in the number of electrons leads to an additional electron shell, the molecule becomes bigger and more polarizable, so the London dispersion forces increase. However, this clashes with the claim that, as a rule of thumb, London…

Does anyone know a conversion of the molarity of an acid to it's pH or a place where there is a table with this information?

The densities of alkali metals probably increase down the group. My text book said that it is because the increase of atomic number. And the text book also states that the large sizes of alkali metals are the reason of low densities compare with others, as there would be less atoms exist in a given volume in metal lattices. However, in alkali metals, down the group, isn't the atomic size increases? So if the atomic size increases, shouldn't the density decrease? But why the densities increase, base on the given data in text book? Is there any misunderstanding here?

Hi One of my suitemates at my college dorm has been stealing food from me and a bunch of other people, we're looking for a way to incriminate him. It's going to be hard to set up a camera, so i was wondering if there was any benign chemical that would turn a person's skin pink upon ingestion, or some other kind of chemical marker....

I put a piece of copper metal in a solution of hydrogen peroxide, and its coming a lot of bubbles from the copper. so my question is, does the hydrogen peroxide oxidize the copper or does the copper catalyze the breakdown of peroxide to water and oxygen?

How does Am 241 effect the gold in smoke detectors? also.. do some material goods still use radium?

If we react H2 and Cl2 we get 2HCL. The H is covalently bonded to Cl. This is a polar molecule with the H side being positive and the Cl side being negative. This molecular polarization is due to the high electronegativty of Cl and the stability created by completing its octet of electrons If we dissolve HCl in water the covalent bond break forming two ions; the H+ cation and the Cl- anion. Although these two ions will charge balance within neutral water, (ionic charges should cancel) the affect within water will be highly electrophilic due to the acid H+ aspect of HCl having a much greater impact that the basic Cl- aspect. In other words, although the Cl- is nuc…

Is there any way to get only the ions of a metal into a solution? Say you have a solution of CuCl2. Is there a way to remove the chloride ions, leaving aqueous Cu2+ without reducing the copper to copper metal?

what is the effect of ionization on atomic radii? i assume that an anion has a larger radius than a neutral atom and that a cation has a smaller radius. this would mean that the attractive force between the protons and electrons would increase when there are less electrons and decrease when their are more. or does changing the balance in either way mean that the attraction is greater, regardless of whether there is increase in positive or negative charge, and thus that either type of ionization decreases atomic radius?

Today, I did another nice experiment, now with selenium. I transformed the black allotrope into the red allotrope. Less risky than the chromyl chloride experiment, but fun also . This may also be interesting for people who collect elements. Black selenium is affordable. It can be obtained for just over $10 per 30 grams, including shipping worldwide from http://www.emovendo.net . This is sufficient for all the experiments with selenium you can ever dream of . For my experiment you only need approximately 10 mg, so you have some left for other experiments as well :D. For the experiment, see my site again: http://81.207.88.128/science/chem/exps/selenium/index.h…

Just wondering... is it possible to demagnetize, say, a neodymium magnet? May sound stupid, but I'm just curious... (by demganetize I mean completely remove is magnetic field).

Which properties of atoms do chemists use to estimate properties of compound molecules? To illustrate: Let's consider O2 and N2. O2 is far more reactive than N2, yet their properties are not that different. They are close in weight and size. Both are lacking electrons to form a "perfect" configuration, and their electron negativities are not unalike. Both form dimers. As far as I can see, Oxygen dimers forms double bonds, and Nitrogen triple bonds, so there's a difference there. Is this what accounts for the lack of reactivity of N2, or are other properties in play? A more complicated example: let's consider CO2 and COS. CO2 has a triple point at 195K, and COS a f…

So I threw some CuCl2 solution in NaOH solution. I got what I wanted. However, something odd has happened. I add enough CuCl2 until no more Precipitate forms. Then I stir the stalagtite-looking things of Cu(OH)2 and the precipitate turns A LOT lighter. The addition of more NaOH darkens the precipitate. I'm really not sure of any other precipitate that could be formed and it is unlikely that when you stir the Cu(OH)2 it spontaniously reacts, but how then can you explain more NaOH darkening the precipitate to near it original darkness? Any impurities are very minimal. One thing I thought of was partical size. Cu2O can be lots of different colors depending on partical si…

Ok, I am frustratingly un-knowledgeable (is that a word?) when it comes to chemistry, but it all just fascinates me. So I decided to pick up a good book and hopefully learn some stuff (my high school class is dumb, we spent the whole 1st semester learning how to do calorimetry, rxn equations, simple stuff like that). I went to Barnes and Noble, and looked around their extensive sciences division (there were probably, oh, 5 different books) and picked up Linus Pauling's "General Chemistry." 300 or so pages into it, I have decided that it is an excellent text for anyone just getting into chemistry. Some of the stuff is WAY over my head (some of the equations are really …

I am having a bit of trouble understanding the charges of certain atoms. For example, Potassium reacts with Phosphorus producing Potassium phosphide. The balanced equasion is: 3K+P--->K3P Phosphorus has an atomic number of 15 and if I put 2 electrons in the first shell, 8 in the second, and 5 in the third I can see that it would gain 3 electrons from the cation. But as soon as the atomic number gets bigger , I can not use this method to figure out the charge of certain anions. What I am doing wrong? Or is there no method and I simply have to remeber each charge? Thanks in advance, Free Thinker

Over the summer I used some very powerful neodymium magnets to obtain some magnetite, with the hopes of being able to purify it to thermite-grade (I failed). I know that HCl reacts with Fe2O3, so I decided to use some of my magnetite to observe a Fe3O4 reaction. When I put the reactants in the test tube, I noticed that only a few bits of sand mixed in with the magnetite seemed to be reacting. A few days later, I ran a magnet over the solid left at the bottom of the test tube, and it's still magnetite. Why didn't it react? I suppose it's possible that it reacted, and the Fe3O4 was in excess, but the test tube doesn't seem to have lost any magnetite at all.

What goes on with respect to the physics of the nuclei of atoms, is not 100% necessary to study chemistry. All the chemists needs to know is the number of protons within the nucleus, to know the atom, and the atomic orbitals being used by the atom. This is not to say that the physics of the nucleus and elementary particles is not important. But for the chemist, chemistry begins at the outer orbtial layers. The reason I made this knit picking distinction is connected to the introduction of a new frontier in chemistry. This frontier is associated with modeling cells in terms of a single variable found within all cells, i..e, hydrogen bonding. As a first approximation,…