Chemical Kinetics 1 Overview Getting Started Techniques Procedure FAQ Full Lab Manual Introduction & Goals Chemistry & Background Key Questions Prelab Problems Safety Procedure In Your Write-up Experiments Index ChemLab Home		Applets Kinetics Plot This applet allows you to enter kinetic data and plot the absorbance vs. time, the natural log of absorbance vs. time, or the inverse of absorbance vs. time. This will allow you to quickly evaluate the reaction order since these are the expected linear plots for zero, first, and second order reactions, respectively. Linear Least Squares This applet allows you to enter any linear data and determine the best-fit slope of the line. You can use this applet to determine the slope of your lines, once you have your kinetics data in a linear form. Technique Links Spectrometer Pipet Buret Goals In this two-week experiment you will measure the rates of chemical reactions. By observing the progress of a reaction over time, you will determine the rate law, test a possible mechanism, and determine the temperature dependence of the reaction rate constant. In week 1, you will determine the rate law and postulate a rate limiting step for the reaction. In week 2, you will measure the rate constant at different temperatures, to determine the reaction's activation energy. Key Questions 1. How do you determine the rate law of a reaction? 2. What is the reaction order with respect to each reactant and how can you distinguish between a zero, first, or second order reaction? 3. What is a rate limiting step of a reaction and how does it effect the rate law observed? Time-lapse view of this week's reaction Click on the green arrow to view a slide show of this week's reaction. As the reaction procedes, the color of one reactant fades, leaving a colorless solution. You will observe the progress of the reaction over time by measuring the absorbance of the solution with a spectrometer. Having trouble viewing the slideshow? Help is here.
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