问题 填空题

(3分)工业上冶炼金属铁的主要反应为:Fe2O3 + 3CO  =" 2Fe" + 3CO2。其中,Fe2O3     __________(填“被氧化”或“被还原”),CO作_________(填“氧化剂”或“还原剂”)。在该反应中,若消耗了1 mol Fe2O3,则生成__________mol Fe。

答案

被还原 还原剂  2

题目分析:在反应中,氧化铁失去了氧,发生了还原反应,被还原,是氧化剂。碳得到了氧,发生了氧化反应,是还原剂。由反应式可知,氧化铁在反应中失去了氧,发生了还原反应,是氧化剂。根据反应规律,物质反应的量之比等于化学计量数之比,故生成2_mol Fe。

点评:解答本题的关键是要充分理解氧化还原反应的含义,知道氧化剂在反应中提供了氧的特征,只有这样才能对问题做出正确的判断。

单项选择题
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How many of us would temp for three years while we waited for the perfect job Not many of us, perhaps. But Wentworth Miller, the "Prison Break" star, said he chose to wait even longer time (1) he found the right job.
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