budullewraagh

is it a Pt/Rh alloy? and how much is in it?

it's much easier to get NaI than HI, Na and I2. just buy it. HI is controlled in the US because of its ability to, when used with rp, reduce ephedrine. I2 is hazmat to a degree and sublimes. Na is, well, Na. reactive metal. NaI is a pretty harmless salt

a better way: in dilute sulfuric acid: H2SO4+NH4NO3-->NH4HSO4+HNO3 in concentrated sulfuric acid: H2SO4+NH4NO3-->NH4HSO4+N2O5 in the latter, the gas evolved is very, very dangerous

well, i have to say, i've heard of people doing this many times without failure. i wouldn't say cheaper, as NaOH is dirt cheap and it doesn't take that much current to electrolyze the hydroxide

speaking of dichromates and volcanoes, one can use powdered ammonium dichromate and sodium thiocyanate to make long green "snakes" erupt from a pile of dust.

i've heard of Np being in smoke detectors. what's "zippo?" we already have multiple threads on this. mods?

what sorts of experiments does she want to perform? give me some criterions. i can help, but i need to know what is considered "dangerous" and what is relevant to the curriculum she teaches

heating what to 500 celsius in argon? electrolyze fused sodium hydroxide. or you could do reduction of the carbonate with finely divided magnesium or aluminum at very high temperatures

could you define this "element zero?" protons? electrons?

"I feel slightly dumb, but, what do stoichiometrically and fractionally crystalize mean, and how do I do them?" stoichiometrically add an acid. if you know how much CaCO3 you have, convert it to moles and add enough acid so that all the CaCO3 forms the aqueous salt of the acid. make sure the anion of the acid is compatible with Ca. that means no sulfate, for example. a good bet would be HCl. boil the solution until CaCl2 crystals form, then remove them. if you want pure elemental Ca, it can be difficult to make. one idea is to thermite, or better yet, you can fuse the CaCl2 and electrolyze it. just be sure to have a good stream of argon on your mixture, as the Ca will oxidize immediately. if you want pure Ca metal, http://www.kno3.com is a good source

CaCO3 is almost completely insoluble in water. if you want the calcium, stoichiometrically add an acid, remove the other insoluble materials and fractionally crystallize

the class that is taught in place of american history is "southern history." from word of mouth, i have heard that some schools require southern history, but do not require american history, and that it is more popular for people to take "southern history." a quote from http://www.southernmessenger.org/Education.htm " It would seem, however, that in 1999, again nearly 150 years after the Southern independence movement, scholars and administrators would not be so hesitant at the inclusion of accurate portrayals of Confederate and Southern history in their efforts to educate the young people of America. Yet this is far from the actual case. We have already seen a high profile case in North Carolina where a course on Southern history was yanked from the curriculum of a college, no less, because it was deemed as politically incorrect." that's the first source i found. will that suffice?

right, i was thinking of using electrostatics, wave functions, angular momentum and the like, but i was hoping there would be an easier way

(a continuation from the bush stem cell thread) a few quotes:

well, it's transmitted through fluid exchange, so i guess in that case it's like HIV. takes a few months to get over it usually. most of the time, people don't even notice they have it. when one's immune system isn't working particularly well, they become susceptible to it.

"I don't think I'm the one who's appearing foolish at the moment, but we can discuss the subject of regionalism if you like. I'd be interested in seeing someone try to support the position that the cultural elites of the northeastern states actually do have a point (as opposed to being the cultural fascists I believe they are). Why don't you start a new thread on it and summarize your position (like your points on education), and I will respond (and I promise not to Godwin it)." well, you label me a regionalist but you have yet to even address the issues i have raised. am i a cultural elitist? if recognizing the differences in education in the northeast and the south makes me an elitist, perhaps i am. but then being an elitist isn't so bad, is it? just comparing and contrasting like a good student of social sciences. once again, i ask you to kindly remove certain words from my mouth. you speak of culture. i spoke of education. please define "cultural facist." i'm not so sure it would be wise to start a new thread on this; i have explained my position. i am curious as to how you could possibly defend your position.

this morning i was looking through an organic book i am borrowing. reading about bond angles, i came across the fact that not all SP^3 bond angles are 109.5 degrees. i knew this before, but i didn't know the way to calculate the angles. this book discusses the fact that Cl-C-H bonds in CH3Cl are 108 degrees and calls the C-Cl bond an SP^3.1 and H-C-H bonds are 110 degrees with a C-H bond of SP^2.9 character, but still, it doesn't explain how one can come to these conclusions. does anyone know a way to calculate the bond angles made by a central atom that is not bonded symmetrically? conceivably, one could calculate this using the average positions of bonded electrons and electrons in lone pairs, as well as bond lengths, but i'd rather not do that because i believe there is a much simpler way. or at least i hope so. i can't think particularly well these days, as i've had the epstein-barr virus for 3 weeks now. mononucleosis is no fun

well, you just did respond to what you implied to be either a "personal attack," a "regional rah-rah", or both. in actuality, i merely pointed out the true differences in education between the northeast and the south. it's unfortunate, but undeniable that overall, the south lacks sufficient funding for their school systems. it's unfortunate, but undeniable that a great number of southern districts refuse to begin "american history" until the late 1860s. it is unfortuante, but undeniable that a great number of southern districts refuse to teach evolution. it is unfortunate, but undeniable that southern schools appear to have the tendency to place a lesser emphasis on the importance of academic merit. the truth is that overall, the northeast performs better academically. now, one can call the above "slanderous," but without facts to support such a statement, one would look quite foolish. it is important to recognize the fact that apathy spawns ignorance. so be in denial, but the scores won't change significantly without active and conscious efforts towards improvement.

"I don't think it's an active effort to keep the US behind in the sciences, though -- I think it's a lack of understanding on the part of the far right about the important role science has played in our success, the ability of other countries to advance science without us, and an inability to look past certain ethical points to look at larger ethical considerations (i.e. they wouldn't necessarily even object on moral grounds if they looked at the whole picture objectively instead of ideologically)." well, while it isnt entirely effective, it is a means for pushing one's agenda. "I disagree with Bud's point about the south still recovering from the civil war, etc. You'd be hard pressed to find a more ignorant fool than a yankee who's confident in his knowledge that liberalism equals righteousness and that the northeast is the center of the civilized world. Typical blue-state foolishness. The kind of thinking that generates more failed Democratic candidates. You need to move past that kind of nonsense." i knew the backlash was coming. kindly remove those words from my mouth and hand me some mouthwash. see, the problem is, while what i said is completely politically incorrect, i don't care and actually my statements were all accurate. no, i didn't say that liberalism isn't righteousness. i'm not into righteousness; it seems too...southern conservative christian for me. and no, i didn't say the northeast is the center of the civilized world. i have to say, however, that our education system beats the bloody tar out of that of the south. remember, certain districts start "american history" at reconstruction. then kids get to the AP exam and become confused. wait, the US didn't just come into existence during the late 1860s?? now of course, the south has its fine school districts and institutions, but overall, it is significantly lacking when compared to the northeast. "The problem we have right now in this country isn't the far right. It's the confluence of power in both extremes, to the detriment of the center. Our inability to compromise will, some day (hopefully not in my lifetime), be the death of this nation." the problem we have in this country is ignorance, hands down.

i dont think it has anything to do with his own religious beliefs. the government has twisted religion to gain the support of the zealots, and has been successful. i don't think he cares enough personally to make the decision based on his own beliefs. rather, i think it is merely another means for appealing to the zealots and keeping the ignorant just that, ignorant. when science is hindered, ignorance prevails. it is in his interest to keep the united states behind in sciences. consider his voting base. as a general statement, the south is severely lacking when it comes to public education. stem cell research would not happen in the south, because of the zealots. this would make the north stronger and more advanced. consider the economic power of the north, compared to the south, which still has yet to recover from the civil war, or so it appears when compared to the north. money and knowledge are power. if the south doesn't want money/knowledge, bush will defend them by preventing such money/knowledge from being obtained by the north. now the question of nullification is arisen

also, you may want to make sure your reagents are mixed very intimately. a good way to do this is to add a little ether and stir. then just let the ether evaporate off

feel lucky you are from the UK. murders occur on a regular basis less than 2 miles away from my house

i disagree, jdurg. they dont necessarily kill you. they dont necessarily harm you significantly. i would find phosphine to be more dangerous than h2s.

when you react conc H2SO4 with KClO4 you get Cl2O7, NOT HClO4. SO3+H2O-->H2SO4, yes, but at high concs, what are those fumes? SO3, NOT H2SO4.

the orbitals aren't quite fixed. they're nearly fixed, i understand. nonetheless, the rotational motion of one of them does not cause the others to change position on any of the x,y, or z axes