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Denaturation of Protein by Strong AcidJohn W. Moore, Jerrold J. Jacobsen, Gary Trammell, Kristin Johnson "Strong acid denatures egg white proteins.This video contains voiceover:""The tertiary structure of egg white proteins is held together by hydrogen bonding and hydrophobic interactions. Adding strong acid to the protein disrupts the intermolecular forces, and the tertiary structure is lost. The loss in protein structure is called denaturation. The proteins precipitate, forming a white solid."""
Extraction of Acid with Base Water and diethyl ether are shaken in a separatory funnel with a small amount of red indophenol. The non-ionic indophenol remains in the ether layer, coloring it red. Addition of sodium hydroxide converts the indophenol to its blue ionic acid anion which is extracted into the water layer turning it blue.
Reactions : AcidBaseRxns (20 Variations) In order to answer the following questions, write the net ionic equation for the reaction between equal volumes of 0.10 M solutions of the following acid and base:
KOH(aq) + HBr(aq)
What are the reaction products? Does the reaction yield an acidic, basic, or neutral aqueous solution?
NetorialsRebecca Ottosen, John Todd, Rachel Bain, Mike Miller, Liana Lamont, Mithra Biekmohamadi, and David B. Shaw Netorials is a collection of about 30 online tutorials on general chemistry topics designed as a supplement for high school or college introductory courses. Each Netorial contains several pages of interactive instruction that includes animated mouse-overs, questions for students to answer, and manipulable molecular structures. Ottosen, Rebecca; Todd, John; Bain, Rachel; Miller, Mike; Lamont. Liana; Biekmohamadi, Mithra; Shaw, David B. J. Chem. Educ.2008, 85, 463.
Acids / Bases |
Electrochemistry |
Reactions |
VSEPR Theory |
Stoichiometry
Imidazole as a pH Probe: An NMR Experiment for the General Chemistry LaboratoryWilliam J. Hagan, Jr., Dennis L. Edie, and Linda B. Cooley An experiment is described that employs the 1H-NMR signal of aqueous imidazole to determine the pH of an unknown solution. The procedure involves the preparation of a calibration curve, which is then used for the analysis of the unknown(s). Hagan, William J., Jr.; Edie, Dennis L.; Cooley, Linda B. J. Chem. Educ.2007, 84, 1188.
Acids and Bases (Netorials)Rachel Bain, Mithra Biekmohamadi, Liana Lamont, Mike Miller, Rebecca Ottosen, John Todd, and David Shaw Acids and Bases: this is a resource in the collection "Netorials". In this module there is an introduction to the chemical properties of acids and bases. Afterwards, the sections include topics such as Molecular Structures of Acids and Bases, Ionization constants, properties of salts, buffers and Lewis theory of Acids and Bases. The Netorials cover selected topics in first-year chemistry including: Chemical Reactions, Stoichiometry, Thermodynamics, Intermolecular Forces, Acids & Bases, Biomolecules, and Electrochemistry.
Acids / Bases
ChemPaths 104 W Apr 13John W. Moore Today in Chem 104:
* Lecture: Structure and Acid-Base Strength; Buffers
* Reading:
Kotz: Ch. 17, Sec. 8, 10
Moore: Ch. 16, Sec.6; Ch. 17, Sec. 1,3
* Homework #10 due by 11:55 PM F Apr 15
* Quiz in second discussion section this week
* Lab this week is #6, Acid and Base Solutions
Acids / Bases
Acids (GCMP)David M. Whisnant Acids: this is a resource in the collection "General Chemistry Multimedia Problems". We will observe the reaction of sodium bicarbonate with three acid solutions. 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.
