UNC Chemistry Fundamentals

Chemistry Virtual Textbook Acid-base chemistry can be extremely confusing, particularly when dealing with weak acids and bases. This set of lessons presents an updated view of the Brønsted-Lowry theory that makes it easy to understand answers to common questions: What's the fundamental difference between a strong acid and a weak acid? Can acid A neutralize base B? This complete rewrite of the previous 1996 pdf document is now organized into seven lessons covering all aspects of the subject. Much emphasis is placed on the practical aspects of calculations, including how to deal with quadratic equations and how to judge when approximations are appropriate.

Online chemical modeling environment (OCHEM): web platform for data storage, model development and publishing of chemical information Conductive Polymers Lists of Nobel Prizes and Laureates Conductive Polymers Play the Conductive Valley Game About the game Find out what you can use conductive polymers for in the future by furnishing a house! The Nobel Prize The 2000 Nobel Prize in Chemistry was awarded for the discovery that plastic can, after certain modifications, be made electrically conductive. Share this: Share on facebook Share on google_plusone_share Share on twitter More Sharing Services9 Share on email To cite this pageMLA style: "Conductive Polymers". Recommended: The Legacy of Alfred Nobel On 27 November 1895 Alfred Nobel signed his last will in Paris. Play the Blood Typing Game Try to save some patients and learn about human blood types! Unlocking the Secrets of Our Cells Discover the 2012 awarded research on stem cells and cell signalling. Contact E-mail us Press Sitemap A-Z Index Frequently Asked Questions Terms Follow Contact | Press | Sitemap | FAQ | Terms Copyright © Nobel Media AB 2014 Follow us: Follow us: Facebook Google+ Twitter YouTube

Bond Energy If we pass a direct electric current through water containing enough ions to make it a good electrical conductor, it will break down into its constituents: hydrogen and oxygen. Both hydrogen and oxygen gas exist as diatomic molecules so the equation for this chemical reaction is The prefixes tell us that it takes 2 molecules of water to produce one molecule of oxygen and two molecules of hydrogen. If we decompose 36 grams of water (2 moles), we produce 2 moles of hydrogen gas (4 g) and one mole of oxygen gas (32 g). In this reaction, covalent bonds between the hydrogen atoms and oxygen atom in water have been broken and new bonds — between the hydrogen atoms in H2 and the oxygen atoms in O2 — have been formed. This reaction requires the input of energy (electrical in this case). Bond Energy There are many forms of energy: electrical mechanical chemical but all forms are ultimately converted into heat. The kilocalorie is also the unit used to describe the energy content of foods.

MSDS ARCHIVE FOR THE CNTECH LABORATORIES MSDS (Material Safety Data Sheets) at CNTech Etchants, adhesives, plating baths, etc. Safety Information All chemicals at CNTech can be idenrified by their CAS (Chemical Abstract Service) Registry Number. This is a unique identifier that tells you, for example, that acetone and dimethyl ketone are actually the same substance. From a safety and inventory perspective, this is a terrific idea. The Synchrotron Radiation Center (SRC) has a safety manual available on the Web. More information is available from the SRC Safety Officer, Bruce Neumann All chemicals at CNTech should be labeled with a hazard code chart, like the one shown below. Blue – Health Red – Flammability Yellow – Reactivity White – Special precautions For a more detailed explanation of these hazard codes, start here . Other Reference Materials A table of synonyms, structures, and uses of some common lithography molecules can be found here. Evaporation Return to the main CNTech Labs page Not all chemicals on this list are still in the lab.

Plasmas Plasmas exist in a wide range of settings and varieties. Most stars are made up of plasma. The Aurora Borealis is a plasma light show in our upper atmosphere caused by the bombardment from space of the solar wind - another kind of plasma. Lightning bolts are visible plasma trails left by the passage of the electric current that formed it. As stated in the definition, plasma is a gaseous type of state where the matter making the plasma consists of electrically neutral and charged particles. Overall, plasma is electrically neutral having as many positive ions as free electrons distributed through it. Accelerating electrons through ordinary gas can create plasma, in just the way they create lightning. If you do it in a very low pressure gas - something like the interior of an incandescent light bulb - you usually just get a kind of diffuse glow. How does a Plasma Globe Work? We apply an electric voltage to the metal electrode in the center of the plasma globe.