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  • Location
    Western Australia
  • Interests
    As above + Astronomy + science fiction especially time travel themes
  • College Major/Degree
    B Ed(Physical Sciences)
  • Favorite Area of Science
    Physics and Chemistry
  • Biography
    Married with a miracle child
  • Occupation
    Science Teacher(Physics and Chemistry)


  • Quark

Ferdinand's Achievements


Quark (2/13)



  1. For Beau, "My problem is with the >reaction of ammonia solution and silver as both as ion or solid. In >particular I would like to know whether AgOH is possible from the >reaction of limited ammonia solution (being a base) and either >silver ion or solid. I have searched on the internet for AgOH with >no result therefore I thought that when silver is reacted with any >base it either forms a Ag20 precipitate or a Ag(OH)2- ion. I'm also >not sure which one would be the product from limited ammonia. I >understand that in excess ammonia silver will form a complex ammonia >ion but dont know the limited solution. If the product is Ag2O can >you include the reaction because I'm not sure if 2Ag + OH- --> 2Ag2O >+ H+ seems quite right. Please can you help me with my query. >Althought this is not likely to be in the exams it is still >annoying me." Colleagues, I seek an elegant answer here. Thanks Ferdinand
  2. I cannot logically get my head around the dilation of time, or that time elapses differently according to who is observing what. But in particular, how was Einstein, or anyone else, able to reason that time was not an absolute and now have it confirmed by experimentation? I am still not enlightened about why - though I can regurgitate some of the explanations that I do not truly understand. I apologise if this has been raised, discussed and answered previously. If so, could you please direct me to an enlightening repsonse to my ignorance? Thanks. Ferdinand
  3. Thanks for your reply. Interestingly, our GAA is very old - >15 years but there's no solid block ..it's all liquid... Have you burned propanoic acid? If so...what's the "interesting" smell? Nando
  4. A colleague of mine ignited propanoic acid. The resulting smell was described as quite unsettling for him and some of his students. He then attempted to ignite glacial acetic acid which does have a flammable symbol on the reagent bottle. However, he could not ignite it. Can anyone enlighten(no pun here) us high school chemistry teachers why we weren't able to ignite flammable glacial acetic acid? Thanks Ferdinand
  5. Woelen, an interesting response from Ann....March 1, 2006 An aqueous solution of copper(II) sulphate will contain the hexaaqua ion and the pentaaquamonohydroxyl ion, one of which is violet and one green (Having been retired many years, I've forgotten which is which, but the answer was contained in Dr. Alan Sharpe's Inorganic Chemistry, published many years ago. It may be included in one of his later textbooks.) Is it possible that the violet ion changes to the green ion under the conditions discussed? The commonly encountered blue solution contains a mixture of the two ions. Ann Burton - Macclesfield, Cheshire, UK
  6. Spirit levels have fluroscein(mispelt i think), I believe.
  7. The mantles used in gas lamps are also radioactive. Thorium Oxide coatings?
  8. My "Genie in a bottle" is always a winner, except it takes 1-3 seconds to run, and about 1 minute to prepare. So, I "ham" it up a bit. Some people know about "I dream of Jeannie" and I've always been besotted by Barbara Eden. I have always wondered how they do the SFX of the genie coming out of the bottle. I've stumbled on a possible way that I use to introduce fast redox reactions of the non-explosive constricted kind. So, that big puff of "smoke"(actually condensing water vapour) from the "genie's bottle" is spectacular. But you do it twice without your audience being aware that you have two bottles. We use conical flasks; one is a 100 mL one and the other(hidden one tha the students are not aware of) is a 5 L one. Pour about 10 mL of 35% hydrogen peroxide, while you're introducing the genie factor, or you can make it a straight chem lesson. While everyone is focussed on the conical(with safety glasses) sprinkle a small amount of potassium permanganate crystals( 3-5 grains quickly) and stand back. Genie comes out of the bottle. Careful, highly exothermic and if you put in to much grain you'll stain your surfaces as the genie comes out. Now, once your audience has recovered, bring out from underneath your bench the 5 L conical flask. (Big Genie!!!) Pour perhaps 50 -100mL of 35% H2O2 and carefully but quickly drop in perhaps a pea-sized amount of potassium permanganate crystals -but no more...and watch - but don't blink because you may miss it!!! Don't panic about the cloud the shoots out of the top of the conical flask - it's just a concentrated amount of condensing water vapour that I keep hoing will turn into Barbara Eden. A physics Or physical chemistry demo I love to do once a year is to get the atmosphere to crush a 44 gallon drum(or two) in about <0.25 seconds...The shock wave is something to behold! Watching skeptical kids' jaws drop to the ground as it happens is priceless.(Preparation time is excessive!)
  9. I have always had the desire to throw a piece of caesium into water and simultaneously drop some into fluorine gas.
  10. Tom is a very large fellow, who is also a fishmonger. What does he weigh?
  11. The grinding of sugar in a darkroom....with mortar and pestle???
  12. Aristotle "informed me" that there are four elements. Bruce Willis convinced me that there are actually five.
  13. Ferdinand


    The green colour could be the result of the initial oxidation of iron atoms into iron II ions(green in solution) as copper II ions reduce to copper atoms. Some of the iron II ions will further easily oxidise to iron III ions(yellow to brown in solution - I like to call it "diarrhoea" coloured) as more copper II ions reduce to atomic copper. The NaCl simply dissociates and provides ions in solution to facilitate the charge flow and assists the previously mentioned redox processes to occur more efficiently. However, this is only one view of a possible mechanism. You may also want to read the thread "Nails in Copper II chloride...it is very enjoyable, in my humble opinion.
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