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EL

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Everything posted by EL

  1. Perhaps he did not discover "Post editing" yet.
  2. Conc. Sulphuric acid is a molecular level H2O remover. It does not "just" absorb water, it extracts it molecularly from other molecules.
  3. It is extremely difficult to predict the product without being a much more controlled reaction. You may have anything from ferric oxalate hydrate to oxalato ferrum hydrate complex. The colour ranges from yellow to green, and even polymerization is evident. A much better defined complex double-salt is ferric ammonium oxalate, due to the masking of one acidic end of oxalic acid by the ammonium radical. High polymers of ferric oxalate crystals can be found in kidney stones. The most soluble form of the salt is a 1:2 ratio of ferric to oxalic, which forms when the acid is very diluted. This solubility is retained at 1:3 ratio, but and fractional ratios else than those are undefined.
  4. Sorry {latentheat} You must have hit the submit button right before me on the edge of the minute. I had to edit my post to make clear to whom it was directed. akcapr, the quiz was much easier than you think. If the the electrodes were not corrodible, water would have been electrolysed. So you should never "expect" any gasses other than Oxygen and Hydrogen. So what happens! NaCl must be retained in the solution. Your final product is Ferric hydroxide, Fe(OH)3 Where from do you think iron got three hydroxide groups, .....water. Then hydrogen must be liberated for logical balance. Using AC will generate hydrogen at both electrodes. The ionic polarisation of water causes the generation of NaOH at one end and HCl at the other and hydrogen gas escapes at the first while iron is oxidized at the second, but HCl is right there, hence water and FeCl3 will form; On the second half of the cycle, NaOH forms right beside FeCl3 and the exchange takes place; Then the proces repeat untill iron is depleted. Even if the electrodes were platinum, chlorine would never form the gas state but HCL, that is how Oxygen is liberated in water electrolysis. The AC mode is more efficient than the DC mode for producing Fe(OH)3 because ions do not need to travel in solution.
  5. akcapr, Noooooooooooooooooooooooooooo.
  6. Any combination of a cation associated with molecules or anions containing unshared pairs of electrons. The interaction can range from purely electrostatic to that approaching covalent character. Metal Cation - The central metal atom in the complex Ligand(s) – the anions or molecules involved in forming the complex with the central metal cation. Ligand Atom – the particular atom involved in the interaction with the central metal atom.
  7. Ferric oxide is a very cheep brownish-dark-red powder found at every painters' shop. If you insist on making it at home for fun, then a dilute solution of NaCl will do with two electrodes of soft Iron carpenters' nails. As {latentheat} explained, but use AC such that NaOH accumulates at both electrodes to catch the ferric chloride and precipitate it as it forms. Now here is your entertainment quiz of tonight: What gas or gases, if any shall be liberated in this process (Hint choices:, Chlorine, Oxygen, Hydrogen, Nitrogen, Methane) What?
  8. Indeed, but woelen is still my man. If it was wood stained with ferric oxide, then you are my man too. It is a shirt, that is why citrate complex should harmlessly do.
  9. woelen! That is my man.
  10. Not neutralization, it is solubilization by forming soluble complexes.
  11. I was just curious, but it is good that you do not know, or it might be even better if you never knew.
  12. OK "hygroscopic acid" that explains it then.
  13. EL

    Coloured Gases

    Industrial production of H2O2 involves (2-ethyl or 2-pentyl-anthraquinone) being converted into (2-ethyl or 2-pentyl-anthraquinol) by a catalysed and hydrogen gas in a hydrogenation reaction, then back to (2-ethyl or 2-pentyl-anthraquinone) by another catalysed and oxygen gas in an oxygenation reaction. Finally H2O2 is extracted by water and separated from the aromatic keton.
  14. EL

    Coloured Gases

    You cannot produce H2O2 by simply dissolving oxygen in water or else every glass of water in your blender will turn into H2O2.
  15. Is that room in Central Gabon or in North Finland?
  16. So you found out about the lemon juice trick, ha!
  17. What an Eutectic coincidence!
  18. Vomiting mechanism is not triggered from the stomach only. Although it probably evolved as a mechanism for expelling ingested poisons, vomiting may result from many causes not related to poisoning, ranging from gastritis to brain tumours. The feeling that one is about to vomit is called nausea. It usually, but not necessarily, precedes vomiting, nor does it always lead to vomiting. Antiemetics are sometimes necessary to suppress nausea and vomiting. The medical branch investigating vomiting, emetics and antiemetics is called emetology. irritation of pharynx, oesophagus, stomach, duodenum; or stretch of the muscular layer of the stomach or duodenum. Either mechanism evokes normal reflex arc to produce vomiting. Therefore, the common saying is short of truth.
  19. The only type of safe explosives I know of that are usually better stored away are my jokes. As soon as one is exposed to them they "burst" in laughter.
  20. EL

    Urea

    I only left for half a day, and when I came back I found out this mess. No, this is the correct information: pH = -log a_H {[math]\cf{pH = -log a_H}[/math]} pK_a = -log K_a {[math]\cf{pK_a = -log K_a}[/math]} K_a = [H+][b-] / [bH] ***** In other words Urea is barely acidic, but it is strongly alkaline on heating its aqueous solution because CO2 leaves ammonium hydroxide behind.
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