TIGER

Other Resources: 17 results
Ionic Bonding  Ed Vitz, John W. Moore
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Ionic Bonding
Binary Ionic Compounds and Their Properties  Ed Vitz, John W. Moore
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Ionic Bonding
Chemical Properties  Ed Vitz, John W. Moore
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Ionic Bonding
Ionic Compounds Containing Polyatomic Ions  Ed Vitz, John W. Moore
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Ionic Bonding
Energy and the Formation of Ions Lecture Demonstrations  Ed Vitz
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Ionic Bonding
Ionization Energies Lecture Demonstrations  Ed Vitz
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Ionic Bonding
Molecular Models of EDTA and Other Chelating Agents  William F. Coleman
Deirdre Bell-Oudry presents a variation on an old theme in her paper on using an indirect EDTA titration for sulfate analysis (1). EDTA and (often loosely) related species are this month's Featured Molecules.EDTA is a hexaprotic acid (H6Y2+) having the pKa values given in the featured paper (1). Figure 1 shows a distribution diagram for the EDTA system (2). At the pH of normal waters, the predominant species have one or both of the nitrogen atoms protonated.Complexation, however, requires that both nitrogens be deprotonated and it is generally assumed that the form that complexes with metal ions is Y4−. Structures of several forms of EDTA are included in the molecule collection (Figure 2). These structures are quite flexible having many conformations that are readily accessible at room temperature.An introduction to EDTA chemistry leads to broader questions of metal ion chelation or sequestration. Related chelating agents included in the molecule collection are EGTA, DCTA, NTA, BAPTA, and DTPA. Molecular dynamics and Hartree-Fock calculations on BAPTA (Figure 2) confirm that many conformations, ranging from those with the phenyl rings parallel to one another, to more elongated forms, are essentially isoenergetic in room temperature aqueous solution (3).Also included in the molecule collection are several crown ethers, an isophore (nonactin), and a cryptand. These not only provide students with a glimpse of the types of molecules being employed for metal ion sequestration but open a wide range of topics of current research in a variety of areas of inorganic, industrial, environmental, and biological chemistry.
Aqueous Solution Chemistry
Hydration of Ions  Ed Vitz, John W. Moore
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Aqueous Solution Chemistry
Conjugate Acid-Base Pairs and pH  Ed Vitz, John W. Moore
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Aqueous Solution Chemistry
Ammonia (GCMP)  David M. Whisnant
Ammonia fountain: this is a resource in the collection "General Chemistry Multimedia Problems". In an ammonia fountain, a flask is filled with ammonia gas. A tube from the flask extends into a pan of water that contains phenolphthalein. When a rubber bulb full of water is squeezed, the water squirts into the flask. Water from the pan then is pushed into the flask and the indicator changes color. 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.
Acids / Bases |
Aqueous Solution Chemistry
The Nobel Prize and Aqua Regia  Robert Hetue
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Aqueous Solution Chemistry |
Precipitation / Solubility
Ionic Equilibria in Aqueous Solutions in Foods  Sofia Erazo
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Equilibrium |
Nutrition |
Aqueous Solution Chemistry
Buffer Solutions  Ed Vitz, John W. Moore
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Acids / Bases |
Aqueous Solution Chemistry
Hydrogen and Hydroxide Ions  Ed Vitz, John W. Moore
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Aqueous Solution Chemistry |
Water / Water Chemistry
Lattice Energy  William F. Coleman
PowerPoint presentation covering various aspects of the concept of lattice energy at the introductory and intermediate inorganic chemistry level. The presentation will open directly in the browser if your system has been so configured.
Crystals / Crystallography |
Ionic Bonding |
Solids |
Enrichment / Review Materials
Radius Ratio  William F. Coleman
This is a set of animations that demonstrates properties of the spherical holes formed when uniform spheres are packed. Cubic, octahedral and tetrahedral packing arrangements may be examined without anything in the holes,and with the repective holes filled. The sizes of the various holes relative to the spheres being packed are shown, which can lead students into an exploration of the radius ratio concept. An example is given of computing the relative size of an octahedral hole.
Crystals / Crystallography |
Ionic Bonding |
Solids |
Enrichment / Review Materials
Introduction of Aquatic Chemistry in General Chemistry Curriculum;Spreadsheet Calculation Approaches  Chulsung Kim
Fundamental aquatic chemistry concepts may be introduced in general chemistry classes by computing ionization fractions and buffer intensity of aqueous phase carbonate systems. This Excel spreadsheet may used to build graphic presentations of a titration curve, distribution diagram, and buffer intensity as a function of pH. Accompanying activities are designed to enhance the concepts of acid-base equilibrium through exploring the relationship between pKa/pKb, pH of the solution, ionization fractions, and buffer intensity, and to exercise students graphing skills.
Acids / Bases |
Aqueous Solution Chemistry |
pH |
Titration / Volumetric Analysis |
Water / Water Chemistry |
Equilibrium