Compound Interest: Spiral Notebooks. ChemIDplus Advanced - Chemical information with searchable synonyms, structures, and formulas. Quality Chemistry Teaching Resources Since 1998 Or So. Dynamic Periodic Table. Elements.wlonk.com: Descriptions, Uses and Occurrences. The Chemistry of Glow Sticks. Click to enlarge Everyone’s familiar with glow sticks, but it’s likely that fewer are familiar with the chemistry behind their glow.
You may have wondered what happens when you snap a glow stick to activate it; by doing this, you’re actually kicking off a chemical process that eventually leads to the production of the coloured light. But how does this process work, and why do you need to bend the glow stick to initiate it? Glow sticks actually contain two separate compartments, with two different chemical solutions. One solution, in the case of most glow sticks, contains a diphenyl oxalate compound, along with a dye whose identity varies depending on the desired colour. The reaction that takes place is between the hydrogen peroxide solution and the diphenyl oxalate. The exact energy of the light given off is dependent on the structure of the molecule, and this allows different colours to be achieved. Compound Interest. Search and share chemistry.
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Metric Download "Formula Club & Practice Blitzes" in the Summer Assignment Page. We shall next do Unit 6, Equations, here and follow it with unit 5. Unit 6 Equations ..... Chemical Equation Balancer - F. What makes disappearing ink disappear? Carbon dioxide.
A common type of disappearing ink is based on an acid-base indicator called thymolphthalein. This is a molecule that absorbs visible light when it is in an alkaline solution, and becomes colorless in a neutral or acidic solution. Thymophthalein To turn it into a blue ink, we add sodium hydroxide (lye), a strong alkali. As long as the solution is basic (alkaline), it will be blue. But if we allow the ink to soak into paper or cloth, so that there is a lot of surface area in contact with the air, it will absorb carbon dioxide from the air. The neutral solution is no longer blue, but colorless. Reaction Finder for the Organic ChemIST. Reactive Groups. Reversible flow (when I show this in class, minds are blown) 12Google + 33StumbleUpon Interesting video showing Laminar Flow and demonstrating fluid flowing in layers.
Very cool! Filmed at the University of New Mexico – Physics Department. This apparatus was developed by John DeMoss and Kevin Cahill of the Department of Physics & Astronomy. Periodic Table of Elements [Interactive] Physics 2000. - StumbleUpon. Dihydrogen Monoxide Research Division - dihydrogen monoxide info. Twelve Free Chemistry Databases. Just two years ago, trying to find free online chemistry databases was an exercise in futility.
Now, they're sprouting up all over the Web like wildflowers after a wet Spring. What follows is a far-from-complete roundup of some of the more interesting places to start your chemical search. PubChem- The granddaddy of all free chemistry databases. Search over 8 million compounds by a variety of criteria. Although some PubChem records are linked into the primary literature through MeSH, most are not. 15 Awesome Chemistry GIFs. You don’t need to watch Breaking Bad to know that chemistry is pretty awesome.
Below, we explore our favorite 15 chemistry GIFs and the science behind them (when we could figure it out): Melting Metal With Magnets The Science: The copper wire has a significant amount of AC electricity running through it, causing it to act like a really strong electromagnet. In the metal slug, eddy currents form due to the magnetic field the copper wire is causing while the copper wire has high frequency AC flowing through it. The metal slug’s electric resistance causes a portion of the electric energy to turn into heat, but the heat builds up until the metal slug becomes white hot and melts.
Orange LED Light In Liquid Nitrogen The Science: When an LED is immersed in liquid nitrogen, the electrons lose a lot of thermal energy, even when the light isn’t turned on. Awesome Chemistry GIFs: Heating Mercury Thiocyanate Hydrogen Peroxide Catalyzed By Potassium Iodide. Chemistry Crayon Labels set of 48 by QueInteresante. How big is a mole? (Not the animal, the other one.) - Daniel Dulek. A comprehensive biography of Avogadro can be found here: The mole is taught in every introductory chemistry class one can take at the college level.
Here's an example of a chemistry course: There is an entire day dedicated to commemorating Avogadro's Number. National Mole Day: Sparknotes is a great resource for quick learning. ThermoDex. Select PROPERTIES you are looking for: About ThermoDex | List of Titles Indexed | Finding Thermodynamic Infomation (Guide) | Library Catalog ThermoDex contains records for selected printed and web-based compilations of thermochemical and thermophysical data for chemical compounds and other substances.
You can select one or more compound types and link them to one or more property terms, and ThermoDex will return a list of handbooks that could contain these data. Due to copyright and technical considerations, the actual data are not contained in ThermoDex. The Wooden Periodic Table Table. Grand Orbital Table by Manthey. Periodic-table.png (2500×1456) Atomic Weights and Isotopic Compositions for All Elements.