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Precipitation Reactions Two versions of the Orange Tornado, two reactions under a microscope, and updated stills of other precipitation reactions provide dramatic visual displays of solid formation.
Equilibrium : KspSaturation (12 Variations)
Zn(OH)2 has a Ksp of 4.5 x 10-17. If you have a solution of Zn(OH)2 that has a hydroxide ion concentration equal to 4.6 x 10-6 mol/L, the solution is ... (Assume that the only relevant reaction is the solubility-product equilibrium.)
Using the Science Writing Heuristic To Improve Students' Understanding of General EquilibriumJames A. Rudd, II, Thomas J. Greenbowe, and Brian M. Hand This study examines the performance of students using the Science Writing Heuristic approach, which facilitates scientific inquiry by structuring the laboratory notebook in a format that guides students to answer directed questions, on lecture exams and a laboratory practical exam on chemical equilibrium. Rudd, James A., II; Greenbowe, Thomas J.; Hand, Brian M. J. Chem. Educ.2007, 84, 2007.
The acid equilibrium constant is unity!Baldwin, W. G.; Burchill, C. E. The attempt to assign a non-unity value to this equilibrium constant is a consequence of misunderstanding the way in which the (nearly) constant concentration or activity of the solvent in a dilute solution (or of a pure solid or liquid in a heterogeneous system) is treated when formulating the conventional equilibrium constant expression. Baldwin, W. G.; Burchill, C. E. J. Chem. Educ.1992, 69, 514.
Nitrogen Oxides (GCMP)David M. Whisnant Nitrogen Oxides: this is a resource in the collection "General Chemistry Multimedia Problems". Two of the most important nitrogen oxides, N2O4 and NO2, are in equilibrium with each other. We are interested in how this equilibrium shifts with temperature. General Chemistry Multimedia Problems ask students questions about experiments they see presented using videos and images. The questions asked apply concepts from different parts of an introductory course, encouraging students to decompartmentalize the material.
Equilibrium
How Accurate Is the Steady State ApproximationLars Ole Haustedt, Jonathan M. Goodman The steady-state approximation is commonly used in enzyme catalysis kinetics calculations, but how much error does the approximation introduce? This Java applet allows you to visually determine the accuracy of the steady-state and pre-equilibrium approximations.
Equilibrium
ChemPaths 104 W Mar 2John W. Moore Today in Chem 104:
* Lecture: Chemical Equilibrium
* Reading:
Kotz: Ch. 16, Sec. 1-2
Moore: Ch. 14, Sec. 1-2
* Homework #6 due by 11:55 pm F Mar 4
* Quiz #4 given in second discussion section this week
* Biomolecules Tutorial: Enzymes and Moodle Quiz due Today at 11:55 pm
