Hydrogen Peroxide and Iodide Kinetics

Only available on StudyMode
  • Download(s) : 325
  • Published : March 4, 2013
Open Document
Text Preview
ID:
CHEM1010H – Report 3
(Be sure to state references for any cited value at the end of this report. Additionally, all report material must be in INK – pencil or white-out will render the work ineligible for mark appeal)

1.What observations and conclusions can you note about each of the three reactions that occurred in the test tubes where you combined potassium iodide, KI, and hydrogen peroxide, H2O2 (in part 1) of the experiment? (Give a detailed explanation of any observations that you made, i.e., what made the colour change, what reactions happened?) ANSWER:

2.Use the information below to develop the necessary calculations for the rate of reaction from the solutions in part B of the experiment •Calculate the initial molarity of iodide ion in each of the solutions, once your solutions are mixed. Remember: The KI stock solution concentration was known: , and you used a specific volume of the solution, -. However, at the start of the reaction you must account for the fact that the total volume of each solution was 200 mL. ANSWER:

Calculate the initial molarity of the hydrogen peroxide in each of your solutions, once the solutions have been mixed. Remember: The H2O2 stock solution concentration was known: , and you used a specific volume of the solution, . However, at the start of the reaction you must account for the fact that the total volume of each solution was 200 mL. ANSWER:

Calculate the number of moles of sodium thiosulfate, Na2S2O3, that was initially present in each solution. Remember: The Na2S2O3 stock solution concentration was known: and you used a specific volume of the solution, . This information is used to determine the number of moles. ANSWER:

Balance the reaction that occurred in each of the solutions. Refer to Eq. 1, 3, and 4 in the laboratory instructions for the components that are involved. ANSWER:

Calculate the number of moles of hydrogen peroxide that has reacted: Note: You will need to...
tracking img