Chemlab: Chemistry 6

Direct to Experiments

Week 1

Week 2

Week 3

Week 4

Week 5

Week 6

Week 7

Week 8

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Week 1: Chemical Kinetics 1
By observing the progress of the reaction over time, you will determine the rate law and confirm the mechanism of the reaction between cyclohexanone and iodine.
Week 2: Chemical Kinetics 2
This week, you will further analyze the results of last week's experiments, and you will carry out experiments to determine the temperature dependence of the reaction rate constant.
Week 3: Coordination Chemistry: Synthesis
In this week's experiment, you will synthesize the coordination compound aquapentaammine-cobalt (III) nitrate, Co(NH3)5(H2O)(NO3)3.
Week 4: Spectrum of the Hydrogen Atom
You will use a meterstick spectroscope to observe and quantify the emission spectrum of hydrogen, sodium, neon, helium, and mercury atoms.
Week 5: Coordination Chemistry: Kinetics of Ligand Exchange
This week, you will study of the mechanism of ligand exchange between your complex, Co(NH3)5H2O3+, and the nitrite ion, NO2-. The reaction will be followed colorimetrically, and you will measure the rates of exchange and ligand isomerization.
Week 6: Coordination Chemistry: Acid/Base Analysis
In this experiment, you will examine the acidity of your coordination complex's water ligand. You will determine the acid dissociation constant, Ka, of the complex by titrating it with base.
Week 7: Coordination Chemistry: Colorimetric and Gravimetric Analysis
This week you will analyze the coordination compound that you synthesized in week 3. You will determine the weight percent cobalt in in your sample by colorimetry. You will also determine the weight percent water in your sample by observing the change in sample mass when the water is driven off by heat.
Week 8: The Color of Dyes and Molecular Model Building
The color of dye molecules is governed by the behavior of the electrons that bond the molecules' atoms. You will measure the absorption spectra of three dyes with closely related molecular structures, and you will use a simple quantum mechanical model to interpret your spectra. In addition, you will use a molecular model kit to build models of simple, representative molecles that exhibit a variety of important and common molecular structures.
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