论文部分内容阅读
一、浓HNO3 氧化能力比稀HNO3 强 ,为什么浓HNO3 被还原成NO2 ,稀HNO3一般被还原成NO ?硝酸具有氧化性 ,如跟铜的反应 : Cu +4HNO3 (浓 )Cu(NO3 ) 2 +2H2 O +2NO2 ↑① 3Cu +8HNO3 (稀 ) 3Cu(NO3 ) 2 +4H2 O +2NO↑②在①中 ,N+ 5→N+ 4;在②中N+ 5→N+ 2 .为什么稀硝酸
1. The HNO3 oxidation ability of concentrated H2O3 is stronger than that of dilute HNO3. Why HNO3 is reduced to NO2? Dilute HNO3 is generally reduced to NO? Nitric acid is oxidizing, such as reaction with copper: Cu +4HNO3 (concentrated) Cu(NO3) 2 + 2H2O +2NO2 ↑1 3Cu +8HNO3 (dilute) 3Cu(NO3 ) 2 +4H2O +2NO↑2 in 1, N+ 5→N+ 4; in 2 N+ 5→N+ 2. Why dilute nitric acid