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25 Strangest Geological Formations On Earth Top 10 Amazing Chemistry Videos - Wired Science Fiery explosions, beautiful reactions, and hilarious music videos are great reasons to be excited about chemistry. Here are some of our favorites. 10. Thermite vs. Liquid Nitrogen The British science show Brainiac asked one of the greatest scientific questions of all time: can liquid nitrogen freeze molten iron? 9. 8. 7. 6. 5. 4. 3. 2. 1. If you have not had enough yet, check out the brilliant collection of Edward Kent.
Theories of acids and bases In fact, the reaction between HCl and water is reversible, but only to a very minor extent. In order to generalise, consider an acid HA, and think of the reaction as being reversible. Thinking about the forward reaction: The HA is an acid because it is donating a proton (hydrogen ion) to the water. The water is a base because it is accepting a proton from the HA. But there is also a back reaction between the hydroxonium ion and the A- ion: The H3O+ is an acid because it is donating a proton (hydrogen ion) to the A- ion. The reversible reaction contains two acids and two bases. When the acid, HA, loses a proton it forms a base, A-. Members of a conjugate pair differ from each other by the presence or absence of the transferable hydrogen ion. If you are thinking about HA as the acid, then A- is its conjugate base. If you are thinking about A- as the base, then HA is its conjugate acid. The water and the hydroxonium ion are also a conjugate pair. A second example of conjugate pairs
Terrific Mini Guide to Help Students Think Critically December 26, 2014 Questioning is the key to critical thinking and through questions students get to explore the deep layers of meanings that would otherwise go unnoticed. Of course not all questions have this analytical ability. For instance, closed questions tend to limit the thinking choices available for students. The same with questions that promote factual recalling. Questions that emphasize the mechanical on the analytical are out of the list. In today's post, I am sharing with you this mini guide created by Foundation of Critical Thinking which you can use with your students to help them better comprehend and apply critical thinking in their learning. I learned about this great resource from a post shared by Education to Save The World. Image credit: Foundation of Critical Thinking
Welcome to the Chemical Education Digital Library Practical Chemistry This website is for teachers of chemistry in schools and colleges. It is a collection of experiments that demonstrate a wide range of chemical concepts and processes. Some of the experiments can be used as starting-points for investigations or for enhancement activities. Many have links to carefully selected further reading and all include information and guidance for technicians. Chemistry is a practical science. We have published a new set of resources to support the teaching of practical science for Key Stages 3-5. Quantitative chemistry Quantitative chemistry is a very important branch of chemistry because it enables chemists to calculate known quantities of materials. For example, how much product can be made from a known starting material or how much of a given component is present in a sample. Quantitative analysis is any method used for determining the amount of a chemical in a sample. The amount is always expressed as a number with appropriate units. An acid-base titration is an example of quantitative analysis. Understand the core ideas in quantitative chemistry Explain how the core ideas of quantitative chemistry develop and progress throughout secondary education Identify common misconceptions and know how these can be addressed Confidently and competently teach aspects of quantitative chemistry to secondary aged students Access a range of activities and resources to support students in their learning of quantitative chemistry
Electricity & Magnetism: Magnets A magnet is an object or a device that gives off an external magnetic field. Basically, it applies a force over a distance on other magnets, electrical currents, beams of charge, circuits, or magnetic materials. Magnetism can even be caused by electrical currents. While you might think of metal magnets such as the ones you use in class, there are many different types of magnetic materials. Iron (Fe) is an easy material to use. Other elements such as neodymium (Nd) and samarium (Sm) are also used in magnets. There are many different types of magnets. Most of the magnets you see around you are man-made. There are also air-core magnets. Electromagnets are different because they have a ferromagnetic material (usually iron or steel) located inside of the coils of wire.