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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?
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.
Acids / Bases |
Dyes / Pigments |
Physical Properties |
Reactions
The Chemical Adventures of Sherlock Holmes: The Serpentine RemainsKen Shaw This story is a chemical mystery, set in the context of Sherlock Holmes and Dr. Watson, that emphasizes qualitative analysis, descriptive chemistry, and forensics. Shaw, Ken. J. Chem. Educ.2008, 85, 507.
Acids / Bases |
Applications of Chemistry |
Coordination Compounds |
Calorimetry / Thermochemistry |
Forensic Chemistry |
Qualitative Analysis
How Does Your Laundry Glow?Richard B. Weinberg This activity examines the effect of pH on the fluorescence properties of the optical brighteners in liquid laundry detergent. Students conduct acid titrations in the presence and absence of a buffer to determine the pH of the fluorescence color transition. Weinberg, Richard B. J. Chem. Educ.2007, 84, 800A.
Acids & Bases A collection of activities that explore basic concepts dealing with acids and bases. They are written for the 4-6th grade level.
Acids / Bases
Universal Indicator Rainbow This hands-on activity, which is part of the ACS-Science for Kids collection, explores a simple acid/base indicator. Students use household solutions of acid and base to change the color of the indicator.
Acids / Bases
A Gas Sudsation In this investigation, students add some soap solution to an empty bottle. They add some baking soda and vinegar. A chemical reaction between the vinegar and the baking soda produces carbon dioxide gas. The interaction between the gas and the detergent creates bubbles. These bubbles have more staying power than the bubbles created by just vinegar and baking soda. With the right amount of each ingredient, students should be able to control the reaction and get the amount of bubbling they are looking for.
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.
