Chemical Reactions Essay

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Chemical Reactions There are five types of chemical reactions. These two major reactions are combination reaction, decomposition reaction, single-replacement, double-replacement, combustion reaction.A chemical reaction is the change of a substance into a new one that has a different chemical identity.A chemical reaction is usually accompanied by easily observed physical effects, such as the emission of heat and light, the formation of a precipitate, the evolution of gas, or a color change.Chemical reactions are described by chemical equations; it’s helpful to indicate whether the reactants or products are solids, liquids, or gases by writing an s, l, or g in parentheses after the symbol for the reactants or products, when solutions of two substances dissolved in water are mixed the symbol aq, is used to describe these aqueous solutions. The chemical reactant and product in chemical reaction is a subject of what is basically happens after the chemical action is take place.Substances involved in these reactions are called reactants, their properties change when combined chemically. The new substances formed by the reactions are called products.The reactants are what you start with (on the left), they "react" with each other and "produce" the products (on the right), an arrow separates them and the arrow means yield, gives or reacts to produce. The first type of reaction is the combination, or synthesis reaction. A combination reaction is a chemical change in which two or more substances react to form a single new substance.An example of this type of combination reaction is the reaction between a metal and a non- metal. Most metals react with non-metals to form ionic compounds. A good example of this would be: Similarly, non-metals may react with highly active metals to form covalent compounds. Example, sulphur reacts with oxygen gas to form gaseous

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