n(MnO 2)=
17.4g
87g/mol =0.2mol,
MnO 2+4HCl (浓)
△
.
MnCl 2+Cl 2↑+2H 2O
1 411
0.2mol n(HCl)n(MnCl 2)n(Cl 2)
(1)n(Cl 2)=0.2mol,V(Cl 2)=0.2mol×22.4L/mol=4.48L,
答:生成氯气的体积为4.48L.
(2)n(HCl)=4×n(MnO 2)=4×0.2mol=0.8mol,
答:参加反应的HCl的物质的量为0.8mol.
(3)n(MnCl 2)=n(MnO 2)=0.2mol,
c(MnCl 2)=
0.2mol
0.1L =2mol/L,
答:生成的MnCl 2的物质的量浓度为2mol/L.