1 Class XII Chemistry Ch 5: Surface Chemistry Chapter Notes Top Concepts / Key learnings: 1. 2. 3. 4. 5. 6. Adsorption: The accumulation of molecular species at the surface rather than in the bulk of a solid or liquid is termed as adsorption. Adsorbate: The substance which is being adsorbed on the surface of another substance is called adsorbate. Adsorbent: The substance present in bulk‚ on the surface of which adsorption is taking place is called adsorbent. Desorption: The process of removing an
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2008 APEC Clean Development Conference – The Current Applications and Future Promotion of Green Chemistry for Sustainable Development National Tsing-Hua University‚ Hsinchu‚ Chinese Taipei Dec.15.2008 Green Chemistry for the Improvement of Human Welfare Gwo-Dong Roam ‚ Wan-Yi Wu‚ Chung-Han Chiou‚ Chung-Wen Yen Office of Sustainable Development Environmental Protection Administration‚ Chinese Taipei Tel: 02-23822841; E-mail: gdroam@sun.epa.gov.tw Viewpoints & Experiences: . Roadmap:
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ST ANDREW’S JUNIOR COLLEGE JC 2 Preliminary Examination CHEMISTRY 9647/03 Higher 2 13 September 2010 Paper 3 Free Response 2 hours Candidates answer on separate paper. Additional Materials: Answer paper‚ Graph Paper‚ Data Booklet READ THESE INSTRUCTIONS FIRST Write your name and civics group on all the work you hand in. Write in dark blue or black pen on both sides of the paper. You may use a soft pencil for any diagrams‚ graphs or rough working. Do not use staples‚
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What is Chemistry? Chemistry is the study of matter and energy and the interactions between them. This is also the definition for physics‚ by the way. Chemistry and physics are specializations of physical science. Chemistry tends to focus on the properties of substances and the interactions between different types of matter‚ particularly reactions that involve electrons. Physics tends to focus more on the nuclear part of the atom‚ as well as the subatomic realm. Really‚ they are two sides of the
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university of Business Agriculture and Technology Assignment No-01 Course name- General Chemistry “Topic” The importance of Chemistry in our daly life Submitted to Dr.Mohammad Harun-Ur-Rashid Submitted by Group-Royals Chemistry: The chemistry is the study of substances specially their structure‚ properties‚ transformations and the energy accompanying these transformation. Chemistry is very important within our daily lives. We are using it all of the time without even realizing
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1008.0 Table 1.2: Qualitative Data: Before During After Magnesium (Mg) strips were dull due to the oxidization. Even after sanding the strip‚ there were still places of oxidization. Hydrochloric Acid (HCl) was clear‚ colourless and liquid. When the Mg strip was dropped into the HCl the release of white gas could be observed due to the reaction. The gas release caused animated fizzing. Temperature of boiling tube increases significantly‚ thus we can consider the reaction as being an
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A. Role of Chemistry in Society Applications of chemical science have contributed significantly to the advancement of human civilization (1‚ 2‚ 3). With a growing understanding and ability to manipulate chemical molecules‚ the post-World War II chemist was considered a societal problem solver. They synthesized crop-enhancing agricultural chemicals to ensure a constant and viable food supply. They played a significant role in the eradication of deadly diseases by developing life-saving pharmaceuticals
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benzene has a cycle of 6 carbon atoms; there are three double bounds in the cycle. Yet‚ the addition reactions at benzene take place only in special conditions‚ benzene usually giving substitution reactions‚ like: With halogens: C6H6 + Cl2 C6H5Cl + HCl With sulfuric acid: C6H6 + HO-SO3H C6H5-SO3H + H2O With nitric acid: C6H6 + HO-NO2 C6H5-NO2 + H2O The easy formation of the substitution products is a proof that benzene’s character is less unsaturated than the hydrocarbons with conjugated double
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ALCHEMY TO CHEMISTRY Can we say that alchemy and chemistry are two different things? Actually no‚ we can’t. Alchemy is the pioneer of today’s modern chemistry. As the time passed alchemy has changed and developed to form Chemistry. Therefore we shouldn’t think that they are two different subjects. In this article‚ first of all you will learn how alchemy was found and evolved .After that how it transitioned from alchemy to chemistry and finally the similarities and differences between them.
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how chemistry affects us today. Our entire universe is made up of matter which is constantly changing forms and evolving into other forms of energy. Most people have chosen to write their essay about how chemistry has played an important role in everyday life. The simple fact is that chemistry plays an important role in every person’s daily activities from the moment we’re born. Chemistry is the branch of science that deals with the structure of organic and inorganic matter( any substance or organism
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