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? Why are some salts acidic and others alkaline? 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.
Chem Sheets.co.uk 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. 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. Chemistry Demonstrations, Experiments, Labs & Projects These are tutorials for performing your own chemistry demonstrations, laboratory exercises, projects, and chemistry experiments. Photos and movies are available for some chemistry demos. Chemistry Laboratory Safety RulesMake your chemistry laboratory experience safe by following these simple rules. How to Write a Lab ReportLab reports are an essential part of all laboratory courses and usually a significant part of your grade. Laboratory Safety QuizAre you a safe scientist or a menace to yourself and others in the chemistry lab? Is It Safe to Use Kitchen Glassware for Chemistry? Slime InstructionsThere are lots of recipes for slime. Glow in the Dark SlimeWhat is better than regular slime? Baking Soda and Vinegar VolcanoOkay, it's the kitchen equivalent of a volcano, not a real one. Chromatography with Candy and Coffee FiltersAnalyze the dyes used in your favorite candies with paper chromatography using a coffee filter, colored candies, and a salt solution.
sci KNOCKHARDY PUBLISHING produces notes and other resources for AS and A2 Level Chemistry. The module references are for the AQA and OCR examinations but the material applies equally well to other specifications. The pages are saved as PDF files and may be freely read and printed for personal use but they may not be revised or circulated in any other form without the consent of Knockhardy Publishing. JONATHAN HOPTON Selected Pre-2008 specifications Last amended 23/08/2017 Mod 1 Mod 2 Mod 3 Mod 4 Mod 5 Module numbers refer to the latest OCR specification. These, and other, animated gifs are to be found inside my Powerpoint presentations. Complete topics summarised on one sheet Single page help sheets © 2001, 2008, 2015 Knockhardy Publishing and Jonathan Hopton FORMATION OF SODIUM CHLORIDE GCSE Chemistry resources: www.knockhardy.org.uk/gcse.htm F321 F322 F323 F324 F325 Unit numbers refer to the OCR specification. NOTES FOR 2015 SPECIFICATIONS ARE NOW AVAILABLE - see below Mod 6
Carbon cycle Atmosphere 750 billion tonnes of carbon Carbon in the atmosphere is mostly in the form of carbon dioxide with some methane and hydrofluorocarbons. The amount of carbon dioxide in the atmosphere is increasing. Acknowledgement: NASA. Vegetation 600 billion tonnes of carbon Plants store carbon as carbohydrates made from carbon dioxide from the atmosphere. Acknowledgement: Public domain. Soil and organic matter 1,600 billion tonnes of carbon Soil contains a lot of carbon in the form of dead plant material and in the many bacteria and other small organisms that live there. Coal, oil, gas 3,300 billion tonnes of carbon Carbon has been locked up in fossil fuels, built up from once-living things, for millions of years. Sediments and sedimentary rock 1,000,000,000 billion tonnes of carbon The carbon cycle overlaps the rock cycle. Acknowledgement: Bordalier institute. Ocean surface 1,000 billion tonnes of carbon Exchange of carbon dioxide between the ocean and the atmosphere takes place at the surface. Deep ocean