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About Tian_07

  • Rank
  • Birthday 04/17/1990

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  • Location
    Canada... or Malaysia
  • Interests
    Chemistry, Pyrochem, stuff
  • College Major/Degree
    No Degree [Yet;)]
  • Favorite Area of Science
    Pure Chemistry / Microbiology
  • Biography
    Chemistry Freak... Gr.9
  • Occupation
  1. okay my theory on the reason that HF is so strong is because of the strong conjugate base (F-)... an acid's strength is based on the electronegativity of the central atom in an oxoacid and the conjugate base in a binary acid... in this case, F- has an electronegativity of 4.00, and therefore, will attract the hydrogen atom strongly... so it is a weaker acid. HOWEVER, the F- ion is the most reactive of all of the non metals in the whole periodic table, so when the h+ ion has reacted, it tends to react with some of the strongest things, such as glass and other substances, either covalently or electrovalently... so in turn, it seems "strong"... but really is rather weak... HCl and HI are stronger acids than HF, but their conjugate bases are not that reactive... and they would not seem less corrosive... this is my theory... but i could be wrong... so if anyone could reply to me about the "Free F- ion being damned reactive" thing. i'd greatly appreciate it.
  2. ok... mix it in proportion to this mixture: 75 NaNO3 15 C (charcoal) (Measured in moles i believe) 10 S (sulfur) make sure all of the components are pretty damn well powdered... and do not grind dis while its mixed... because it will likely explode... this is sort of mealpowder... u can refine it further to make a counterpart of black powder i think
  3. My favourite experiment screwup... melting wax to use in some melting point experiment or summat... and my friend dupmed a half beaker of cold distilled water into the wax... needless to say... w were cleaning up splattered wax for a long time... and we couldnt eva get all of the wax off... its like the oil effect i guess -_-''
  4. Woah... I Can see this thread had grown since i left.... Been on a short vaca, so havent had much 2 post... but im ordering my chemicals and stuff right now, and they're coming... im going ot do some fireworks stuff... generally single shot aerials and starmines... im not VERY experienced, but i do have a decent background in this stuff... can anyone tell me whether black powder is sufficient to detonate PVC when compacted and pressed inside of it, then fused? (just wondering) cheerz (and let the thread g-r-o-w) Keep posting
  5. thx. ill remember the 1.7 thing... and the polyatomic ion thing i kinda knew... thx
  6. Hey... Anyone have the voltage I would need to create an electrolysis cell, mainly to make NaClO3 from NaCl... does anyone have the proper volage I could use for the cell with Carbon Electrodes? Or better yet.. does anyone have a good way to hook up AC power to the cell? thanx
  7. Sorry... I meant formula... like NaHSO4 or NaCl... Bad Terminology...
  8. lol Probably... O well... ur chemistry seems pretty good... Keep in touch;) Since im in Malaysia, its the International GCSE's so may be different... but in any case... thxz
  9. Some chemicals, like NaOCl (Bleach) emit smell after breaking down for a while, and giving off the chlorine... others like NaOH may break down.. but im not sure.... As for the CO2, im not sure... i think it has something to do with the heat and the fact that theyre more energized than O2... but im not sure... cheerz
  10. Thatz true... lol im in form 3/ Grade 9 level.. next year ill be in GCSE. But i studied under canadian syllabus for 7 years. so maybe we learned some different things, or terms for it. True though that the H+ OH- attraction is the driving force. Theres the basic point i believe. Cheerz
  11. O... ic... sorry... i was taught that the H+ ion is attracted to water itself... as water is an amphiprotic solvent... so it accepts the H+ by acting as a base in this case, to form the H3O+ ion, acting as an acid. True that the H+ ion is released into the water, but it is a result of water being amphiprotic and accepting this extra H+ ion that acids work the way they do. Amphiprotic, by the way (i think u probably know) is when a substance can act as a base and acid, thereby declaring it neutral. i could be wrong... so if neone has anything more on this correct me cheerz
  12. Ionic Compounds are made by electronic attraction, and, therefore, break back into the original ions (Na+ and Cl- for Sodium Chloride) when dissolved into water or amphiprotic solvent. All acids and Bases work on this principle. Covalent Molecules are actually individual molecules, and are bonded by their valance electorn configuration. Ionic Compounds are different in the sense that they are... yeah... just ratios... but covalent molecules are actually individuals. How does one actually differentiate an ionic from covalent using only the name? Is there a proper way... or is it memorization of formulas. I know about ions and stuff... but not too much... anyone got anythin on this? Cheerz
  13. Well H+ and H2O ions = H3O right... I Guess You Could say H+ as well... But like i said ... [H3O is actually (H+) and (H2O)] sorry if im gettin confusing... cheerz
  14. K... heres something for the ppl in gcse levels and stuff Acid + Base (Hydroxide) --> Salt+Water Acid + Carbonate --> Salt + Carbon Dioxide + Water Acid + Metal --> Salt + Hydrogen Gas Acid dissolved in water will ionize into two ions: H3O+ ion and the Ion of the conjugate base x- eg. HC2H3O2 in water will become H3O+ C2H3O2- A Metal Hydroxide Dissolved in Water will become Metal (+) ion and OH- ion eg. NaOH dissolved: Na+ OH- The Driving Force to create the salt and water thing is the attraction between the H3O+ and OH- [H3O is actually (H+) and (H2O)] to create the covalent compound water... H2O The remaining ions just bond together to form the salt... Hope that helpz.... chill out
  15. There are some periodic tables which do place one of the hydrogen blocks above the halogens... i gues thats y... and yeah ive heard the name hydronium before. ITs supposed to be the resulting ion of an acid dissolved in water... hydride... other than lithium hydride... can someone give me a example of a hydride... because on the tables nowadays... I only c the H+ atom... no more H- thx
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