experiment 29 use the experiment in the supplemental packet, not the lab manual, for this experiment...

Experiment 29

Use the experiment in the supplemental packet, not the lab

manual, for this experiment

CHE118 1

In Lab

• Work in groups of 4

• Do one trial run with everyone participating to observe the reaction and the data acquisition

• Divide the various trials among all four lab partners; exchange data

CHE118 2

Table 1(The only table with data)

• Volumes are given in the lab procedure; use a graduated cylinder to measure reactants

• The time for a completed trial should be written in units of seconds (whole numbers)

• Timers are provided in lab, or you can use your own timer

CHE118 3

Table 2

• Concentrations need to be calculated because the concentrated solutions are diluted when the reactants are mixed togetherUse the dilution equation (chapter 4 text)(Mc) (Vc) = (Md) (Vd)

The rate of reaction is: Rxn rate =(-)(1/a)(Δ[A]/Δt) = (-)(1/b)(Δ[B]/Δt) (Text, chp 14)

rxn rate = (-)(1/1)(Δ[I2]) / (Δt) (This is simplified in the table)

CHE118 4

Orders and k

1. Determine the exponents in the rate law equation:Rxn rate = k[acetone]m[H+]p[I2]n

2.Determine the value of k, the rate constant, for each trial and the average k value3.Calculate the reaction rate by using the completed equation and trial 5 data:Rxn rate = k[acetone]m[H+]p[I2]n

CHE118 5