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一、熟悉气体分离、提纯与检验的常用装置 二、排除干扰 1、气体经过溶液(除浓硫酸)会带出水蒸气,所以要检验水分,应在通入溶液之前,一般放在第一步;而要除去水分,则一般放在最后一步。 2、CO2对CO的检验有干扰,所以检验CO前要除尽CO2。 3、H2O对H2的检验有干扰,所以检验H2前要除尽H2O。 4、HCl对CO2的检验有干扰,所以检验CO2前要除尽HCl。 三、中考题回放 1、水煤气是一种重要的工业气体燃料和化工原料。水煤气除了含有CO和H2外,还含有CO2和水蒸
First, familiar with the common devices for gas separation, purification and inspection. Second, to eliminate interference. 1. The gas passes through the solution (in addition to concentrated sulfuric acid) and brings out water vapor. Therefore, to test the moisture, it should be placed in the first step before the solution is introduced. ; And to remove the water, it is generally the last step. 2. CO2 interferes with the inspection of CO, so CO2 should be removed before testing CO. 3. H2O interferes with the inspection of H2, so H2O should be eliminated before testing H2. 4. HCl interferes with the inspection of CO2, so the HCl must be removed before testing CO2. Third, the examination questions playback 1, water gas is an important industrial gas fuel and chemical raw materials. In addition to CO and H2, water gas also contains CO2 and water