将48.8克铁粉和氧化铁粉末的混合物,溶于800mL稀硫酸中,恰好完全反应.在标准状况下收集到2.24L氢气,且反应后的溶液中加入KSCN溶液不变色.求稀硫酸的物质的量浓度.
0.875mol/L
人气:415 ℃ 时间:2019-08-21 22:14:06
解答
n(H2)=V/Vm=2.24/22.4=0.1molFe+H2SO4=FeSO4+H2↑1 1 10.1mol 0.1mol 0.1molFe2O3+3H2SO4=Fe2(SO4)3+3H2O 1 3 1x 3x xFe+Fe2(SO4)3=3FeSO4 1 1x x因为铁和氧化铁一共48.8克,则:56×0.1+56x+160x=48.8 解得:x=0.2mo...
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