1. M

    Ammonia/oxygen reaction stoichiometry

    2NH4 +3O2 >> 2NO2 +4H +2H2O - 3.43g O2/g to convert 2NO2 + O2 >> 2NO3 - 1.14g O2/g NO2 oxidized Total oxidation reaction: NH4 + 2O2 >> NO3 +2H -H2O - 4.57g O2/g N oxidized Can someone please explain how the gram of O2 per gram of ammonia/nitrite is calculated? Thanks!
  2. J

    Does a neutralisation reaction with higher volumes create more heat?

    In a multiple choice question, I assumed that half the volume of 2 acids and bases with constant concentrations would mean half the temperature. The answer suggests there is no change. Can anyone explain this? I can't understand how presumably half the molecules can produce the same amount of...
  3. C

    Organic chemistry reaction scheme

    Can someone help me with this reaction schemes?
  4. L

    Calculate reaction orders.

    Hi I am new here and really hoping someone can help me with this question I have please...… (B) Through experimentation, you note that at high temperatures ethyl chloride produces HCl and ethylene by the following reaction: CH3CH2Cl(g) → HCl(g) + C2H4(g) Using the rate data for the...
  5. C

    The yield of the reaction product

    Hello,people:) Check please answers of the exercises. Ex.1.40 g of zinc oxide was reduced by excess carbon. Determine the mass of the formed metal if the yield of the reaction product is 85%. Ex.2.490 g of a 20% solution of sulfuric acid was neutralized with slaked lime Ca (OH) 2, and 60.6 g of...
  6. O

    Unknown Redox reaction.

    Hey guys. I have a practical question. In my spare times i work on japanese blades as a hobby. I use natural japanese whetstones on carbon steel blades. These stones have some unique properties in the sense that they are the finest natural sharpening stones but they also have a strange...
  7. R

    balancing redox reaction

    balance redox reaction $MnO_4^- + C_2O_4^{2-} + H^+ ==== MN^{+2} +CO_2 +H_2O$ i am not able to balance the charges in the end
  8. B

    what definition of acid and base theory fits in potassium chloride + water reaction?

    We've been asked to identify the acid and base in KCl+H2O with appropriate acid-base definition and only the reactants are given. We've learnt the following theory in class, Arrhenius, Brønsted–Lowry,Solvent System, Lux-Flood, Lewis. I think the completed equation would be KCl+6H2O→K(H2 O)6]^+...
  9. C

    Schmidt reaction - advice on solvents

    The question is about the chemistry of the carbon-carbon bond. My friend and I want to try a Schmidt reaction starting with an alkyl carboxylic acid and converting to an intermediate azide then hydrolysis of this via an intermediate isocyanate to the corresponding primary amine. This is the...
  10. G

    Replacement Reaction

    Hello everyone! I was wondering what kind of reaction could happen between Bismuth (III) Nitrate and Iron. I mixed a 0,2 M Bi(NO3)3 solution with Iron. I could watch many little resplendent particles floating in the solution, the liquid changed its color (from transparent to a light brown) and...
  11. B

    Chemical Reaction or Mixture?

    Not sure how to begin or steps to take to answer: When combining a known preservative/inhibitor of bacterial growth, with a known antimicrobial agent that is an oxidizer, will a chemical reaction occur or is it simply a mixture? Preservative: Methyl chloro isothiazolinone (C4H4ClNOS) Oxidizer...
  12. A

    How do reactant proportions affect the products of a chemical reaction?

    Is it correct that if you alter the proportions of the reactants of many chemical reactions, especially step-wise, the products will change? Here is an example, please tell me if it is right or not: KOH + H2SO4 ==> KHSO4 + H2O 2KOH + H2SO4 ==> K2SO4 + 2H2O
  13. T

    Heat of reaction

    Hi I am Toks I loved chemistry in highschool ....but currently in final level chemical engineering ...I'm from west Africa i have a serious issue with getting the heat of reaction for production of polycarbonates from bisphenol A and DPC...
  14. S


    i forgot the concepts understanding word by word without practical imaginative thinking. how to understand chemistry like a story. can anyone can tell me
  15. F

    Which reaction can I use to transform 2-hydroxyethyl-triethylammonium bromide to 2-hy

    We have synthesized 2-hydroxyethyl-triethylammonium bromide, then using it we have tried to prepare other salts. First we have used an ion exchange column to obtain 2-hydroxyethyl-triethylammonium chloride, after several tries we didn't get any good results. Following this example : [emim][Br] +...
  16. A

    What are all the ways to prevent Oxygen from chemical reaction?

    For example: this can be used to stop fires. I'm a mechanical engineering student, so I don't know much about chemistry :D, so I was looking for some help with this question. I'm willing to devote much of my time to research this. I would actually form a research team for this if needed. Any...
  17. 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.
  18. C

    Determining a VOx/Al2O3 catalyst

    Would you be able to help? I am a chemical engineering student doing a project on the production of Maleic Anhydride from Furfural. For our reaction we have found papers stating the type of catalyst that would be most preferable. It is in the form of VOx/Al2O3, the paper states the best...
  19. L

    Spontaneous reaction

    Does this reaction 2Ag+Sn^{2+} \rightarrow 2Ag^{+}+Sn happen spontaneously?Calculate its electromotive force in a galvanic cell.
  20. S

    heat reaction problem please help

    Hello everyone! this is my problem: How much energy is required to heat 29.72 g of H2Ofrom 10.00 degrees C to 37.50 degrees C? (heat capacity of H2O = 75.37 J/mol K) answer in Joules. this is what I did: 1- 29.72 g = 1.65 mol of H2O 2- Δt= 27.5 3- e=1.65 mol x 75.37 J/mol K x 27.5 therefore...