Question

In this lab, stock solutions will be available which are 0.23 M cyclohexanone, 0.5 M H+, and 0.018 M I3–.

You will combine the following mixtures: For measuring the order with respect to acid:

Mixture A: 0.5 mL H+ (acid) 1.5 mL cyclohexanone 0.5 mL distilled water

Mixture B: 1.0 mL H+ (acid) 1.5 mL cyclohexanone

For measuring the order with respect to cyclohexanone:

Mixture C: .5 mL H+ (acid) 1.0 mL cyclohexanone 1.0 mL distilled water

Mixture D: 0.5 mL H+ (acid) 2 mL cyclohexanone

You will then add 0.5 mL of I3– solution to each of these mixtures to start the reaction. The total volume of each mixture after the I3– is added will be 3.0 mL. Using this information, determine the initial concentrations of H+, cyclohexanone, and I3– at the start of the reaction for each of these mixtures. Fill in the initial concentrations in the chart below, and copy this data into the similar chart on page 7 of the laboratory procedure. (At a minimum, you should show all of your work and calculations for Mixture A at the bottom of this page or on a separate page, and hand this work in with your Prelab.) Initial concentrations (M): Mixture C: Mixture D: 0.5 mL H+ (acid) 1.0 mL cyclohexanone 1.0 mL distilled water 0.5 mL H+ (acid) 2 mL cyclohexanone

Answer 1

Assuming that no reaction happened. The values of the new concentrations are shown below for mixture A

What I did was to determinate the numbers of moles of each species and the divide them by total final volume.