题干

 我国劳动人民早在春秋战国时期就已经懂得钢铁冶炼,铁也是生活中使用最为广泛的金属,目前我国钢铁产量已经位居世界第一。下面是一组有关铁的问题,请你用所学化学知识加以回答:
(1)用赤铁矿(Fe2O3)炼铁的化学反应方程式是____ 。成语“千锤百炼”就源于生铁炼钢的过程,该过程中发生化学反应的化学方程式是____ 。
(2)铁可以拉成铁丝,压成铁片,这是利用了铁的____性;在公路上行驶的油罐车尾部经常有一条铁链拖在地面上,这是利用了铁的____性;家里铁制炊具要有木柄或塑料柄,这是因为铁有很好的____ 性。
(3)焊接钢管时,经常用硫酸铜溶液在钢管表面画交叉线,然后根据出现的红线对准焊接,用化学方程式表示反应原理____ 。
(4)经研究发现,长期使用我国发明的铁锅炒菜做饭,可有效地减少缺铁性贫血的发生,如果在炒菜时经常加入适量的食用醋,效果会更好,理由是____ 。
(5)某同学在做盐酸和锈铁钉反应实验时,发现含锈的铁钉表面出现了气泡,你觉得原因是____ 。

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答案(点此获取答案解析)

Fe2O3+3COFe+3CO2,C+O2CO2,\u5ef6\u5c55,\u5bfc\u7535,\u5bfc\u70ed,Fe+CuSO4=FeSO4+Cu,\u751f\u6210\u4e86\u6613\u4e8e\u4eba\u4f53\u5438\u6536\u7684\u4e9a\u94c1\u7

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