kinetics

  1. C

    Mathematics of the kinetics

    Hello together, unfortunately, I do not get on with my task: Specify an expression for the concentration of A. Given is: dc(A) ------= -k1*c(A) + k2*c(B)*c(C) dt - Normally I would obey the following steps: 1. *dt =>dc(A)= (-k1*c(A) + k2*c(B)*c(C))*dt 2. Set c(A) to the left side...
  2. A

    Chemical Kinetics: Arrhenius Equation

    Given the same reactant concentrations, the reaction CO (g) + Cl2 (g) ----> COCl2 (g) at 250 degrees C is 1.50 x 10^3 times as fast as the same reaction at 150 degrees C. Calculate the activation energy for this reaction. Assume that the frequency factor is constant. I have been using this...
  3. N

    chemistry question :reaction kinetics

    So i just get homework from my big sister lol. Homework??are you still at school? Ofc not. Just talking to myself lol. So, the question is difficult and she asked for me to help her solved it. So the question is A + B -> products the rate equation for the above reaction is : Rate = k [A] [B]...
  4. Y

    The parameters of the nonlinear kinetics of the chemical reaction of the form

    Hello, I am engaged in scientific activity in the synthesis of optimal control systems chemical reactors. It was proposed to investigate the management system with nonlinear liquid-phase reaction kinetics of this type. Need to find the kinetics parameters (rate constants, activation energy)...
  5. G

    Kinetics

    Hi, I'm currently in Chem 104 in college and am working on kinetics. I am stuck on a couple problems and was wondering if some one could help me out. Here's the first one: The half-life for the radioactive C-14 is 5730 years. How long will it take for 25% of the C-14 atoms in a sample to...
  6. H

    kinetics question - write expression for elementary reactions

    Consider the following mechanism comprised of elementary reactions: A + B -> 2C ... k1 2C -> A + B ... k-1 C + 2A -> D + A ... k2 D + B -> 3B ... k3 What is correct expression for d[B]/dt ? answer: d[B]/dt=–k1[A][B] + k-1[C]2 + 2k3[D][B]. How do you work through the problem to come up...
  7. H

    Problem finding a suitable pH 9 buffer

    Hi everyone, I'm new here and decided to get online to glean some info from those of you with experience/expertise in buffers. I'm trying to find a buffer for pH 9 that will neither bind Cu2+ nor Zn2+, nor be included in beta-cyclodextrin, nor be insoluble in water at 25deg C. I'm making up...
  8. S

    Kinetics problems, please I need your help...

    Hi everyone, I really need your help. Although I've been stuying here and there from the internet, someone at my class stole my book and it's not the same, I still have unclear things on my mind... I have a test tomorrow for the kinetics chapter and I need your help with the following problems...
  9. J

    Chemical Kinetics

    Hey guys, im brand-new to this site. Sorry for asking this if it is somewhere else on this site. i couldnt find it. But we just got into kinetics in my chem course and this was a question that was in the chapter of the book. It seems devilishy simple, im just not converting something right...
  10. S

    Kinetics and Reaction Rates

    Hello, My ap chem teacher have us some problems to work on over the vacation. They are on reaction rates, I tried the question and got answers but they aren't right according to the key he gave us, and we have a quiz on it when we get back. 2. The following data are for Questions 2...
  11. H

    Reaction kinetics

    The decomposition of of A is 1st order which produces B and nitrogen. A ceratin solution gave 80 cm3 of nitrogen on complete decomposition and it took 40mins for 40 cm3 of n2 to be evovled. how long would it take for 70cm3 of nitrogen to be evolved? ans is 120 mins