Magnesium chloride – the main chemical compound from which receive pure magnesium and magneziyny cement. Other use of magnesium of chloride – processing of pavings in winter time. Thanks to the ability to increase water temperature, causes thawing of ice and snow. Receive it both in laboratory, and in industrial conditions.
Instruction
1. An industrial method of receiving magnesium of chloride – bischofite dehydration before receiving complex salt (crystalline hydrate) chloride of MgCl *HO magnesium. That will get rid of excess water in connection, it is heated about 200 °C in the presence of *HO chlorohydrogen.MgCl = by 200 °C of HCl = MgCl ₂ + NODrugoy an industrial method of receiving – heating of caustic magnesite with chlorine in the presence of carbon at t=800 °C.2MgO + 2Cl ₂ + With = 2MgCl ₂ + SOV of laboratory chloride of magnesium can be received effect of hydrochloric acid and its salts on magnesium and some of its connections.
2. Way 1: interaction of compounds of magnesium with hydrochloric acid and chloridamidlya carrying out experience will be required to you a clean test tube. Pour in it hydrochloric acid and fill magnesium hydroxide. Mg(OH) ₂ + 2 HCl = MgCl ₂ + result is formed by HOB chloride of magnesium and water if substance is necessary for you in a dry form, evaporate solution in a vyparitelny cup under an extract. For receiving MgCl ₂ you can use various salts of hydrochloric acid. Add hydroxide to magnesium ammonium chloride solution. Mg(OH) ₂ + 2NH₄Cl = MgCl ₂ + 2NHOHKonechnye products – hydroxide of ammonium and chloride of magnesium. Besides ammonium chloride for receiving magnesium of chloride use chlorides of metals. For example, add chloride of zinc or copper to magnesium nitrate solution. Mg (NO ₃) ₂ +CuCl ₂ = Cu (NO ₃) ₂ +MgCl₂Mg (NO ₃) 2 +ZnCl ₂ = Zn (NO ₃) ₂ +MgClB of dependence on the chosen reagent, as a result of reaction you receive magnesium chloride and nitrate of copper or zinc.
3. Way 2: interaction of pure magnesium with chlorohydrogen or its solyaminasypta in a test tube metal magnesium, add solution of chloride of zinc, copper or ammonium. Remember that magnesium will force out only those metals which in an electrochemical number of tension of metals stand more to the right of it from connections. Mg + CuCl ₂ = Cu + MgCl₂Mg + ZnCl ₂ = Zn + MgCl₂Mg + 2NH₄Cl = MgCl ₂ + 2NH ₃ +H₂Mg + Cl ₂ = reaction is possible MgClPoslednyaya only on paper since in vitro it cannot be carried out, and in the industry it is not used. Carrying out this reaction requires the energy equal-642 KJ on 1 mol of chloride of magnesium.