Download Common Chemical Reactions: Addition, Combustion, Decomposition, Precipitation, Neutralizat and more Summaries Earth science in PDF only on Docsity! table of Chemical Reactions: Access the Virtual Library database or a search engine to research and read about the main types of chemical reactions: Addition reaction: Combustion reaction: Decomposition reaction: Precipitation reaction: Neutralization reaction (acid-base): Reaction oxidation-reduction: Prepare a table and include the chemical reaction its description chemical formula common example. Once completed, send the document to the facilitator through the determined virtual space. Be prepared for a class discussion. Now understand these characteristics in detail. Evolution of Gas โ Some chemical reactions take place with the evolution of gas. For example, when zinc reacts with hydrochloric acid, hydrogen gas is evolved with the formation of zinc chloride. Reaction - Zn + 2HCl โ ZnCl2 + H2 Change in Colour โ Some chemical reactions are accompanied by a change in colour. For example, when colourless lead nitrate reacts with potassium iodide, it forms a yellow precipitate of lead iodide and colourless potassium nitrate. Reaction-Pb(NO3)2 + 2KI โ PbI2 + 2KNO3 Colourless Colourless Yellow ppt colourless Change in Temperature โ Some chemical reactions are accompanied by a change in temperature. For example, some reactions are exothermic in nature, while some are endothermic. Change in Energy โ Chemical reactions often involve a change in energy. During a chemical reaction, energy can be evolved or be absorbed. For example, in combustion reactions, energy is released, such as the burning of a fuel. Change in colour: Change in temperature: Change in energy: Formation of precipitate: Change in state: Formation of Precipitate โ Some chemical reactions are accompanied by the formation of the precipitate. For example, barium chloride reacts with sodium sulphate and forms sodium chloride and precipitate of barium sulfate. Reaction โ BaCl2 + Na2SO4 > BaSO4 + NaCl Precipitate Change in State โ Some chemical reactions are accompanied by a change in state. For example, ammonia gas reacts with hydrogen chloride gas and forms solid ammonium chloride crystals. Reaction โ NH3(g) + HCl(g) โ-> NH4Cl(s) Types of Chemical Reactions Chemical reactions are of many types. Here, we are covering the most common eight types of chemical reactions, which are part of the class X chemistry syllabus as well. Decomposition reaction Combination reaction Combustion reaction Neutralization reaction Single displacement reaction Double displacement reaction Precipitation reaction Redox reaction Decomposition Reaction โ In a decomposition reaction, molecules or compounds break down into two or more than two simpler chemically new substances. For example, electrolysis of water. In the electrolysis of water, water breaks down into hydrogen and oxygen, which show completely different properties than water. Reaction - 2H2O electricity โ 2H2 + O2
