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一、材料1.仪器及药品①仪器:广口瓶、大试管、玻璃管、分液漏斗②药品:浓硫酸、铜片2.原理Cu+4HNO_3(浓)=Cu(NO_3)_2+2NO_2↑+2H_2O3NO_2+H_2O=2HNO_3+NO2NO+O_2=2NO_23.现象a、b 管为红棕红;c、d 管为无色。4.使用情况及优点此装置操作简单,现象明显,便于观察。能使 NO_2或
I. Materials 1. Instruments and medicines 1 Instruments: wide-mouth bottle, large test tube, glass tube, separatory funnel 2 Drugs: concentrated sulfuric acid, copper sheet 2. Principle Cu+4HNO_3 (concentrated)=Cu(NO_3)_2+2NO_2 +2H_2O3NO_2+H_2O=2HNO_3+NO2NO+O_2=2NO_23. Phenomenon a and b are reddish brown; c and d are colorless. 4. Usage and Advantages This device is simple to operate, with obvious phenomena and easy to observe. Can make NO_2 or