向50ml 18mol/L的硫酸中加入足量的铜片并加热,被还原的硫酸的物质的量( )
A. 等于0.9mol
B. 大于0.45mol,小于0.9mol
C. 等于0.45mol
D. 小于0.45mol
人气:456 ℃ 时间:2019-09-23 14:55:22
解答
50ml 18mol/L的硫酸中n(H2SO4)=18mol/L×0.05L=0.9mol,假设50ml 18mol/L的硫酸中的硫酸分子全部与铜反应时,据Cu+2H2SO4(浓) △ . CuSO4+SO2↑+2H2O可知作氧化剂的硫酸为0.45mol,...
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