reactions

  1. Brumer

    Controlling chemical reactions near absolute zero

    In a new study, a team led by Andreas Osterwalder at EPFL's Institute of Chemical Sciences and Engineering, working with theorists from the University of Toronto, have built an apparatus that allows them to control the orientation and energies of reacting atoms, down to nearly absolute zero...
  2. T

    Elemental Iodine reactions?

    Does elemental Iodine react with pure Tungsten, Aluminium and/or Dysprosium? It doesn't appear to react with stainless steel, even when boiling. It just converts to the Triiodide allotrope with Aluminium, but I'd like some clarification nonetheless. Thanks! brumer
  3. A

    Pharmaceutical Structure Interactions

    I am ideally looking for available software like ChemDraw where I can draw a complex chemical structure (Vancomycin hydrochloride for example) and compare possible reactivity with another structure. The complication is the novel nature of this other compound. The end goal is to help support...
  4. B

    Determine ΔE reaction for each of the following reactions?

    2NH3(g)+3O2(g)+2CH4(g)-->2HCN(g)+6H2O(g) 2Al(s)+3Cl2(g)-->2AlCl3(s) So i'm totally lost on how to go about this question. Help getting started would be greatly appreciated.
  5. J

    Oxidation/Reduction/Net Reactions

    I don't know what I did wrong. I've tried working out these problems. Balance the following in acidic solution. (Omit states-of-matter from your answer. Use the lowest possible whole number coefficients.) (a) Ti + Cr2O7^2− → Ti^3+ + Cr^3+ Oxidation reaction: Ti → Ti3+ + 3e- Correct...
  6. C

    Endothermic reactions with polymers

    I am currently working at a Bowden cable manufacturing firm in India over the summer. Some of our cables, which were used with the gearboxes in trucks were rejected and sent back to the plant. The sheathing of these cables, when cut open, revealed nearly ice cold steel fibers (~5 degrees...
  7. C

    Endothermic reactions with polymers

    I am currently working at a Bowden cable manufacturing firm in India over the summer. Some of our cables, which were used with the gearboxes in trucks were rejected and sent back to the plant. The sheathing of these cables, when cut open, revealed nearly ice cold steel fibers (~5 degrees...
  8. J

    Just a few reactions with copper...

    By reaction between 25 g of heterogeneous aluminum, zinc and copper mixture and sodium hydroxide solution, 9.73 cubic dm of hydrogen is released at STP conditions. By reaction between hydrocloric acid and 20 g of newly formed sample, 14.48 cubic dm of hydrogen is released. Determine the mass of...
  9. S

    Chemical reactions

    Hello everyone, I have a question regarding to the chemical reactions between gallium nitride (GaN) wafer and other chemicals. FYI, i'm doing electroless etching to fabricate porous GaN. To be honest, chemistry is not my field. So I have no idea how to solve this chemical reactions. Could...
  10. U

    Help with thermite reactions?

    Why is aluminium used in thermite reaction and not some more reactive metal? Why is aluminium and iron oxide mixed thoroughly for the reaction to work? Why is it dangerous if the magnesium does NOT ignite in the reaction? On a different note, if I am trying to make an accurate solution for a...
  11. S

    H2SO4 in sythesis reactions

    Just trying to write down the general synthesis reactions but what does sulfuric acid specifically do in a reaction? ie. deprotonation or removing an alcohol etc? I can't seem to find any examples online
  12. S

    Balance Redox reactions

    Cr2O7^-2 + NO -> Cr^+3 +NO3^-1 identify two half reactions One of the steps i have problem is for Cr2 charge Cr2 +(-2)7 =-2 Cr2 = 12 so Cr = 6? and so how many electrons gained 12-3= 9 electrons or 6-3= 3 electrons Cr2O7^-2 -> Cr^+3 NO -> NO3^-1 Balance all elements except hydrogen and...
  13. J

    Redox Reactions

    I need help complete reactions. I do not know how to fill in the right side of the reaction. Ex. 2Mg + Osubscript 2 arrow ??????????
  14. J

    Combination and decompostion reactions

    I understand the basic combination and decomposition reactions and the equations but I'm really confused about one thing and it's been annoying so... If for example the combination reaction was between a compound this compound was heated (so reacting with oxygen) how would you be able to tell...
  15. K

    does gold conduct electricity and any daily chemical reactions

    does pure gold conduct electricity? if the gold is mixed with impurities, let say 14k gold or 18k gold jewelry, do they conduct electricity? i know Gold is very inert and it's unreactive. But is there any daily chemicals that could decay pure gold jewelry? As far as I understand, "unreactive"...
  16. Y

    Help with reactions

    Hello all, Basically a student has a mixture of Ca(oh)2 and cuso4. He adds: 1. Water to it 2. Nitric acid to it 3. He filters the mixture with sulphuric acid. 4. He adds ammonia drop wise 5. He adds Potassium Iodide 6. adds Fehlings reagent in a water bath? Could someone please tell me what...
  17. M

    Identifying Oxidation-Reduction Reactions

    All of the following are oxidation-reduction reactions except: (a) 2Al + Fe2O3 --> Al2O3+2Fe (b) (NH4)2Cr2O7 --> Cr2O3 + N2 + H2O (c) Cu + 2H2SO4 --> CuSO4 + SO2 +2H2O (d) Hg(NO3)2 + 4KI --> K2HgI4 + 2KNO3 (e) 2Na + 2H2O --> 2NaOH + H2 So Far I know that: oxidation is the loss of...
  18. M

    Characterizing Acid - Base Reactions

    Which of the following reactions (from the net ionic equations) are characterized as acid-base? Mg + 2H3O^+ ---> Mg^2+ + H2 + 2H2O CO3^-2 + H3O^+ ---> HCO3^- + H2O H3O^+ + OH^- ---> 2H2O I know the last one is an acid-base cause I've seen it being used so much in examples, but I'm...
  19. K

    Help with Sn1 Reactions

    Let's say I have two compounds in an identical solvent. The compounds are also identical except for the following: One has a Br bonded to a tertiary carbon, and the other has an I bonded to a secondary carbon. Which would react first in an Sn1 nucleophilic reaction? On the one hand, the first...
  20. S

    redox reactions.

    Can someone double check i have done this correctly please. Section B: Half Reactions Predict reactivity, write half Reactions and Balance the equations of the following: Mg + CuO à Zn + CuSO4 à Ca + FeO à Na + ZnSO4 à Au + CuSO4 à K + CuSO4 à This is what i have. Mg0 + Cu+2O-2 à...