氯气

nullnullSwedish chemist Sheller In 1774,he found a kind of yellow green gas, it is choking and poisonous .In our daily life and industrial ,it plays an important role. null新建 Microsoft Office Access 应用程序chlorine nullnullⅠ.Physical properties : ⅰ.Yellow green gas. ⅱ.Poisonous with choking smell. ⅲ.The density of chlorine is higher than air. ⅳ.Soluble in water. ⅴ.Easily liquefied.nullThinkingIf you are an unlucky one that fall into a leak of Chlorine event what should you do?nullThe electron arrangement of a chlorine atom+172 8 7nullⅡ.Chemical properties: ⅰ.Chlorine react with sodium ignite 2Na +Cl2 =====2NaCl ⅱ.Chlorine react with iron ignite 2Fe + 3Cl2 =====2FeCl3 React with metalnullChlorine reacts with water to form two acids so the solution is acidic： Cl2(g)+H2O(l) →HClO(aq) +O2 (g)nullHow Chlorine is made in lab?Chemicals：Manganese dioxide, concentrated hydrochloric acid, sodium hydroxide, saturated table salt solution and concentrated sulfuric acid Apparatus：Iron stand, burner, round-bottomed flask, tap funnel, delivery tube, gas jar实验 nullReaction equationMnO2+4HCl = MnCl2+2H2O+Cl2↑MnO2+4H++2Cl-=Mn2++2H2O+Cl2 ↑ Oxidizing agent: MnO2 Reducing agent: HCl In the reaction, elections are transferred from the Cl- to the Mn4+ nullnullThank YouBye-Bye