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硝酸为3大强酸之一,除了具有酸性以外还有强氧化性.中学化学中对其强氧化性的考查主要有以下4种方式.1在离子方程式正误判断和离子共存中考查例1下列反应的离子方程式正确的是().A Fe(NO_3)_3溶液中加入过量的HI溶液:2Fe~(3+)+2I~-=2Fe~(2+)+I_2;B用稀HNO_3溶解FeS固体:FeS+2H~+=Fe~(2+)+H_2S↑;C在氯化亚铁溶液中加入稀硝酸:3Fe~(2+)+4H~++NO_3~-=3Fe~(3+)+NO↑+2H_2O;D将稀HNO_3滴加到Fe(OH)_2沉淀中:2H~++Fe(OH)_2=Fe~(2+)+2H_2O
Nitric acid is one of the three strong acids, and it has strong oxidizing properties besides acidity. There are mainly four ways to examine its strong oxidizing property in middle school chemistry. 1 The following reactions were examined in the case of ion equation error judgment and ion coexistence. The correct ion equation is ().A Fe(NO_3)_3 solution is added with excess HI solution: 2Fe~(3+)+2I~~=2Fe~(2+)+I_2; B dissolves FeS solids with dilute HNO_3 : FeS+2H~+=Fe~(2+)+H2S↑; C Add dilute nitric acid in ferrous chloride solution: 3Fe~(2+)+4H~++NO_3~~=3Fe~(3+) +NO↑+2H_2O;D Add dilute HNO_3 to Fe(OH)_2 precipitate: 2H~++Fe(OH)_2=Fe~(2+)+2H_2O