27.工业上测量SO2、N2、O2混合气体中SO2含量的装置如下图。反应管中

27.工业上测量SO2、N2、O2混合气体中SO2含量的装置如下图。反应管中装有碘的淀粉溶液。SO2和I2发生的反应为(N2、O2不与I2反应):SO2+I2+2H2O===H2SO4+2HI

(1)混合气体进入反应管后,量气管内增加的水的体积等于________的体积(填写气体的分子式)。

(2)反应管内溶液蓝色消失后,没有及时停止通气,则测得的SO2含量________(选填:偏高,偏低,不受影响)。

(3)反应管内的碘的淀粉溶液也可以用________代替(填写物质名称)。

(4)若碘溶液体积为Va mL,浓度为C mol·L-1。N2与O2的体积为Vb mL(已折算为标准状况下的体积)。用CVaVb表示SO2的体积百分含量为:________。

(5)将上述装置改为简易实验装置,除导管外,还需选用的仪器为________(选下列仪器的编号)。

a.烧杯 b.试管 c.广口瓶 d.容量瓶 e.量筒 f.单孔塞 g.双孔塞

答案

答案:

(1)N2、O2的体积

(2)偏低

(3)酸性高锰酸钾溶液或溴水

(4)V%=×100%(其他合理答案也给分)

(5)b c e g或b e g或c e g             

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