Name:

Section:

Read

1. The Background section of this experiment
2. The appropriate sections of your text
3. Chapter 15 of "Concepts of Chemistry"

Questions

1. At the instant H₂O₂ is reacting at a rate of -0.1 moles H₂O₂/L-sec by reaction (2), calculate the corresponding values of
   • d[I-]/dt
   • d[H⁺]/dt
   • d[I₃^-]/dt
   • d[H₂O]/dt
2. Consider carrying out Run 1 using the following stock solutions: 0.200 M KI, 0.2000 M Na₂S₂O₃, and 0.4000 M H₂O₂.
   • Calculate the value of [I^-]₀ to be used in the data analysis.
   • Calculate the value of [H₂O₂] at the instant solutions 1-6 are mixed (t = 0, assume instantaneous addition and mixing of the H₂O₂).
   • Calculate the value of [H₂O₂] at the instant the reaction mixture turns blue between the additions of the 5th and 6th 1.00 mL increment of the Na₂S₂O₃ solution (t = t₅).
   • Calculate the value of [H₂O₂] at the instant the reaction mixture turns blue after the addition of the 10th and last 0.10 mL increment (t = t₁₀).