Chemistry - reaction kinetics

posted by .

So, I go to high school in Texas and we have this AP Chem lab due online tomorrow night by midnight and I need some serious help on these questions: 

 Lab Temp 0.2°C  
Experiment Trial Time in seconds Trial 1 Trial 2 Average Time  
1 1 2 256 275 268 
 2 1 2 215 226 220.5  
3 1 2 83 59 71 
 4 Temp here is 35 ° C 1 83 Unnecessary 

Initial concentrations: Experiment [S203^2-] [S208^2-] [I-]  
1 .0022 .0044 .2222  
2 .0022 .0088 .2222
  3 .0022 .0044 .4444 

 Initial rates from experiments 1,2, and 3 from [S2O3^2-] / ∆t: Experiment [Na2S2O3] (M) Avg. Elapsed Time (s) ∆ Na2S203/ ∆t (M/s) ∆ S208^2-/ ∆ t (M/s) 
 1 .0022 268 8.2X10^-6 4.10*10^-6 
 2 .0022 220.5 9.97X10^-6 4.98X10^-9  
3 .0022 71 3.10X10^-5 1.55X10^-5 

 Questions:
 1. Determine the reaction orders to S2O8^2- using experiment 1 and experiment 2. Hint: Use m = log (rate 1/rate 2) divided by log (concentration 1/ concentration 2).  

2. Determine the reaction orders to I- using experiment 1 with experiment 3. Hint: Use n = log (rate 1/rate 3) divided by log (concentration 1/ concentration 3).  

3. What is the calculated rate law for this equation/reaction? Considering most rate orders have whole integers, what is most likely the correct rate law for this reaction? 

 4. Using the reaction rate calculated, calculate the rate constant for experiments 1, 2, and 3, and then the average rate constant for the three experiments.

  5. Calculate the rate constant for experiment 4 at the elevated temperature.

  6. Why are some reactions heated in laboratories?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Lab in general

    I just read my syllabus for lab and I am kind of shocked at what it says. I do know that I have to write out procedures of the lab in my nbk before coming to lab but I just read that it says "You will NOT be allowed to refer to you …
  2. Chemistry

    Need help with my lab report for specific heat of unknown metal! I need to Find the Specific Heat of Al! I know its Q= M x Cs x Change in Temp I am getting a such a high number am just confused if its right. Here is what I got in Lab: …
  3. Chemistry: Bunsen Burner Lab

    Hi! I have recently completed a bunsen burner lab and need help with a few conclusion questions: 1) What kind(s) of energy is released by the reaction of fuel and air in this system?
  4. Chem Lab Help

    Trial #1 Trial #2 Trial #3 Mass: gelatin capsule (g) .123 .118 .122 Mass: whole alka-seltzer tablet (g) 3.230 3.230 3.230 Mass: capsule + alka-seltzer sample (g) .822 .882 .677 Mass: system before reaction (g) 23.109 23.110 22.735 …
  5. Chemistry lab

    In my lab class I am having to write a lab experiment and preform it tomorrow. It deals with specific heat of unknown metal and density. the first part you have boil water with the metal in it, and then put it in a cup and measure …
  6. Chem Lab Help

    I wanted to know if any one has done the Determination of ASA Content of Tablets Lab Report. I need help doing the post lab questions
  7. Chemistry

    So, I go to high school in Texas and we have this AP Chem lab due online tomorrow night by midnight and I need some serious help on these questions:  Lab Temp 0.2°C  Experiment Trial Time in seconds Trial 1 Trial 2 Average Time …
  8. Chemistry - URGENT

    So, I go to high school in Texas and we have this AP Chem lab due online tomorrow night by midnight and I need some serious help on these questions:   Lab Temp 0.2°C   Experiment Trial Time in seconds Trial 1 Trial 2 Average …
  9. Chemistry Lab

    So I did a kinetics lab on the rate of reaction of peroxydisulfate ion with iodide ion. Part 1 was the effect of concentration. One of the questions asked is to calculate the amount of thiosulfate consumed in moles. My results for …
  10. Chemistry

    I did a lab, an kinetics lab (iodide clock) and in my lab report I have to calculate the initial rate in mol L-1 s-1 and I'm not sure how to do that. I have the [I-] and [S2O82-] in mol L-1 already. The reagents are [KI] [NaCl] [Na2S2O3] …

More Similar Questions