Preparation methods of zinc chloride
In ordinary inorganic chemistry, zinc chloride can be prepared by reacting hydrochloric acid with zinc granules: Zn + 2HCl == ZnCl2 + H2↑, and the prepared zinc chloride usually contains water and the main hydrolysis product: zinc oxychloride. Generally, the following steps are used for purification: add 100g of zinc chloride to 800mL of dioxane and heat for distillation. Filter while hot to remove zinc powder, and after cooling, zinc chloride turns into a white precipitate. Anhydrous zinc chloride can be sublimated by heating in a stream of hydrogen chloride gas, and then heated to 400°C in a dry nitrogen stream. The sample can also be treated with thionyl chloride. To prepare anhydrous zinc chloride, it can be obtained by reacting hydrogen chloride gas with zinc, and zinc can also burn in chlorine gas to produce zinc chloride.
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