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铜与硝酸反应是中学教材中重要的化学实验,该实验是验证硝酸具有强氧化性的重要实验依据。对该实验进行深化加工,可以培养我们科学思维方法、严谨的学习态度和掌握科学研究的基本要求。下面是两道针对该性质的创新实验设计方案,这两个方案从不同的侧面进行设计,各有特点,值得我们借鉴。铜与硝酸反应分两种情况:(1)与浓硝酸反应:Cu+4HNO_3(浓)==Cu(NO_3)_2+2NO_2↑+2H_2O;(2)与稀硝酸反应:3Cu+8HNO_3(稀)=3Cu(NO_3)_2+2NO↑+4H_2O。无论是哪种情况,硝
The reaction of copper and nitric acid is an important chemical experiment in middle school textbooks. This experiment is an important experimental evidence to verify that nitric acid has strong oxidizing property. Deepening this experiment can foster our scientific thinking, rigorous learning attitude and master the basic requirements of scientific research. Here are two innovative experimental design for the nature of these two programs from different sides of the design, have their own characteristics, it is worth learning from. Copper and nitric acid reaction in two cases: (1) and concentrated nitric acid reaction: Cu + 4HNO_3 (concentrated) == Cu (NO_3) _2 + 2NO_2 ↑ + 2H_2O; (2) and dilute nitric acid reaction: 3Cu +8 HNO_3 = 3Cu (NO_3) _2 + 2NO ↑ + 4H_2O. In either case, nitrate