6. Relationship of ΔG°rxn to the Equilibrium Constant

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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 K_{sp} 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.)

The Use of Limits in an Advanced Placement Chemistry CoursePaul S. Matsumoto, Jonathan Ring, and Jia Li (Lily) Zhu This article describes the use of limits in topics usually covered in advanced placement or first-year college chemistry. This approach supplements the interpretation of the graph of an equation since it is usually easier to evaluate the limit of a function than to generate its graph. Matsumoto, Paul S.; Ring, Jonathan; Zhu, Jia Li (Lily). J. Chem. Educ.2007, 84, 1655.

Acids / Bases |

Equilibrium |

Gases |

Mathematics / Symbolic Mathematics |

Thermodynamics

Flame Emission Spectrometry in General Chemistry Labs: Solubility Product (K_{sp}) of Potassium Hydrogen PhthalateFrazier W. Nyasulu, William Cusworth III, David Lindquist, and John Mackin In this general chemistry laboratory, flame emission spectrometry is used to determine the potassium ion concentration in saturated solutions of potassium hydrogen phthalate. From these data the solubility products, the Gibbs free energies of solution, the standard enthalpy of solution, and the standard entropy of solution are calculated. Nyasulu, Frazier W.; Cusworth, William, III; Lindquist, David; Mackin, John. J. Chem. Educ.2007, 84, 456.

Acids / Bases |

Atomic Properties / Structure |

Spectroscopy |

Equilibrium |

Quantitative Analysis |

Thermodynamics |

Titration / Volumetric Analysis |

Solutions / Solvents |

Aqueous Solution Chemistry |

Atomic Spectroscopy

Discovering the Thermodynamics of Simultaneous Equilibria. An Entropy Analysis Activity Involving Consecutive EquilibriaThomas H. Bindel This activity explores the thermodynamics of simultaneous, consecutive equilibria and is appropriate for second-year high school or AP chemistry. Students discover that a reactant-favored (entropy-diminishing) reaction can be caused to happen if it is coupled with a product-favored reaction of sufficient entropy production. Bindel, Thomas H. J. Chem. Educ.2007, 84, 449.

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