![]() ![]() Reaction – NH 3 (g) + HCl (g) -> NH 4 Cl (s)Ĭhemical reactions are of many types. For example, ammonia gas reacts with hydrogen chloride gas and forms solid ammonium chloride crystals. Reaction – BaCl 2 + Na 2 SO 4 -> BaSO 4 + NaClĬhange in State – Some chemical reactions are accompanied by a change in state. For example, barium chloride reacts with sodium sulphate and forms sodium chloride and precipitate of barium sulfate. For example, in combustion reactions, energy is released, such as the burning of a fuel.įormation of Precipitate – Some chemical reactions are accompanied by the formation of the precipitate. During a chemical reaction, energy can be evolved or be absorbed. For example, some reactions are exothermic in nature, while some are endothermic.Ĭhange in Energy – Chemical reactions often involve a change in energy. Reaction – Pb(NO 3 ) 2 + 2KI → PbI 2 + 2KNO 3Ĭolourless Colourless Yellow ppt colourlessĬhange in Temperature – Some chemical reactions are accompanied by a change in temperature. For example, when colourless lead nitrate reacts with potassium iodide, it forms a yellow precipitate of lead iodide and colourless potassium nitrate. For example, when zinc reacts with hydrochloric acid, hydrogen gas is evolved with the formation of zinc chloride.Ĭhange in Colour – Some chemical reactions are accompanied by a change in colour. Now understand these characteristics in detail.Įvolution of Gas – Some chemical reactions take place with the evolution of gas. The reaction is given below.Ĭ 6 H 12 O 6 + 6O 2 → 6CO 2 + 6H 2 O + EnergyĬhemical reactions show one or more than one of the following characteristics. For example, Respiration – we inhale oxygen which reacts with glucose and produces carbon dioxide, water and energy. A chemical reaction is a process in which reactants react chemically and convert into products by chemical transformation. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |