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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.
Hydration of Acetylene: A 125th AnniversaryDmitry A. Ponomarev and Sergey M. Shevchenko The discovery the hydration of alkynes catalyzed by mercury ions by Mikhail Kucherov made possible industrial production of acetaldehyde from acetylene and had a profound effect on the development of industrial chemistry in the 1920th centuries. Ponomarev, Dmitry A.; Shevchenko, Sergey M. J. Chem. Educ.2007, 84, 1725.
Addition Reactions |
Aldehydes / Ketones |
Alkynes |
Catalysis |
Industrial Chemistry |
Reactions
Astrochemistry Examples in the ClassroomReggie L. Hudson In this article some recent developments in astrochemistry are suggested as examples for the teaching of acid-base chemistry, molecular structure, and chemical reactivity. Suggestions for additional reading are provided, with an emphasis on readily-accessible materials. Hudson, Reggie L. J. Chem. Educ.2006, 83, 1611.
Acids / Bases |
Astrochemistry |
IR Spectroscopy |
Molecular Properties / Structure |
Brønsted-Lowry Acids / Bases
Ozonolysis Problems That Promote Student ReasoningRay A. Gross Jr. The structural features inherent in acyclic monoterpenes that follow the isoprene rule often lead to unique sets of ozonolysis products from which their structures, excluding stereochemistry, can be determined from molecular formulas only. This article shows how students may elucidate the structures of these compounds by analysis of the oxidative and reductive workup products. Gross, Ray A., Jr. J. Chem. Educ.2006, 83, 604.
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.
Acids / Bases
Oxides (GCMP)David M. Whisnant Oxides: this is a resource in the collection "General Chemistry Multimedia Problems". In this problem we will explore the properties of the oxides of a few elements. We will add samples of the oxides to universal indicator solution and learn about the acid-base character of the oxides. 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.
