论文部分内容阅读
硫酸这部分知识在高中化学中具有重要地位,是高考的常考题,今天我们就来谈谈如何掌握、运用硫酸知识。硫酸分为稀硫酸和浓硫酸两种。稀硫酸具有酸的通性,能和酸碱指示剂反应;能和Fe、Zn等活泼金属反应;如:Fe+H2SO4=FeSO4+H2↑,而浓硫酸具有吸水性和脱水性及强氧化性。因此,利用浓硫酸的吸水性可用作干燥剂;脱水性是指浓硫酸能使纸屑、棉花、蔗
This part of the knowledge of sulfuric acid in high school chemistry has an important position, is the college entrance examination exam questions often, today we talk about how to master, the use of sulfuric acid knowledge. Sulfuric acid is divided into two kinds of sulfuric acid and sulfuric acid. Sulfuric acid has the acidity of the general, can react with the acid-base indicator; and Fe, Zn and other reactive metals such as: Fe + H2SO4 = FeSO4 + H2 ↑, and concentrated sulfuric acid has water absorption and dehydration and strong oxidizing . Therefore, the use of concentrated sulfuric acid water absorption can be used as a desiccant; dehydration means that concentrated sulfuric acid can make paper dust, cotton, cane