有1吨含Fe2O380%赤铁矿,可炼成含杂质2%的生铁多少吨?

有1吨含Fe2O380%赤铁矿,可炼成含杂质2%的生铁多少吨?

答案

【考点】含杂质物质的化学反应的有关计算.

【专题】有关化学方程式的计算.

【分析】先计算出氧化铁的质量,然后书写化学方程式并代入数据计算出铁的质量.

【解答】解:氧化铁的质量=1×80%═0.8吨,设生成铁的质量为X.

Fe2O3+3CO 2Fe+3CO2

160               112

0.8t              X

得:X=0.56t

∵生铁中杂质的质量分数是2%,所以生铁中氧化铁的质量分数是98%.

∴生铁的质量=0.56t÷98%=0.57吨

答:有1吨含Fe2O380%赤铁矿,可炼成含杂质2%的生铁0.57吨.

【点评】学会利用化学方程式进行计算的方法,注意计算的规范性.

 

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