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仪器和药品:蒸发皿、酒精灯、铜片(或铜丝)、碳酸氢铵、氯化铵、蒸馏水等。操作步骤:1.铜绿的生成。在一硬纸片上平放一药匙碳酸氢铵晶体,取一光亮的铜片(或较粗一点的铜丝),蘸取蒸馏水后插入硫酸氢铵晶体里,几分钟后,铜片周围的原白色碳酸氢铵晶体变为深蓝色。取出铜片,划去碳酸氢铵晶体,使铜片上残留下一些深蓝色液体,再微热此铜片,生成绿色
Instruments and Drugs: Evaporation dish, alcohol lamp, copper piece (or copper wire), ammonium bicarbonate, ammonium chloride, distilled water, etc. Steps: 1. Generation of patina. Place a spatula of ammonium bicarbonate crystals on a hard paper piece, take a bright copper piece (or thicker piece of copper wire), and distill the distilled water and insert it into the ammonium bisulphate crystal. After a few minutes, the copper piece is surrounded by The original white ammonium bicarbonate crystal turns dark blue. Take out the copper piece and cut off the ammonium bicarbonate crystal so that some dark blue liquid remains on the copper piece, and then the copper piece is slightly heated to generate green color