实验室用17.4g的MnO 2 与100mL足量的浓盐酸制取氯气:MnO 2 +4HCl (浓)

1个回答

  • 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.