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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?
A Web-Based Interactive Module to Teach Acid–Base Principles of Drug ActionMaria A. Hernandez and Jolanta Czerwinska Describes interactive compressed video teleconferencing as the distance learning format for an entry-level doctor of pharmacy program. Hernandez, Maria A.; Czerwinska, Jolanta. J. Chem. Educ.2008, 85, 1704.
Acids / Bases |
Drugs / Pharmaceuticals
Construction of a Polyaniline Nanofiber Gas SensorShabnam Virji, Bruce H. Weiller, Jiaxing Huang, Richard Blair, Heather Shepherd, Tanya Faltens, Philip C. Haussmann, Richard B. Kaner, and Sarah H. Tolbert The objectives of this lab are to synthesize different diameter polyaniline nanofibers and compare them as sensor materials. Its advantages include simplicity and low cost, making it suitable for both high school and college students, particularly in departments with modest means. Virji, Shabnam; Weiller, Bruce H.; Huang, Jiaxing; Blair, Richard; Shepherd, Heather; Faltens, Tanya; Haussmann, Philip C.; Kaner, Richard B.; Tolbert, Sarah H. J. Chem. Educ.2008, 85, 1102.
Acids / Bases |
Aromatic Compounds |
Conductivity |
Hydrogen Bonding |
Oxidation / Reduction |
Oxidation State |
pH |
Polymerization |
Synthesis
Colorful Chemical FountainsNicholas C. Thomas and Stephen Faulk A chemical fountain, constructed from several vertically stacked plastic champagne cups, is used to demonstrate acidbase and chemiluminescence reactions. Thomas, Nicholas C.; Faulk, Stephen. J. Chem. Educ.2008, 85, 1061.
Universal Algorithm for Acid-Base Equilibrium CalculationsPavol Tarapèík These Microsoft Excel workbooks facilitate the calculation of the equilibrium composition of simple to complex acid-base systems. Three workbooks are available: 1. pH-mix calculates the equilibrium composition for any mixture of protolytes. 2. pH-titr calculates and presents titration curves. 3. pH-titrd calculates and presents titration curves with derivative curves included. The workbooks require only basic knowledge about Excel and almost no calculation abilities. However, they do require a description of chemical properties of the system components. Thus they allow students to concentrate on chemistry skills rather than laborious algebra and arithmetic.
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.
Acids / Bases
Acids and Salts (GCMP)David M. Whisnant Acids and Salts: this is a resource in the collection "General Chemistry Multimedia Problems". This problem will explore a few properties of common acids and their salts. 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.