M(H2SO4)в р-ре40\%-ном =2000*1,31*0,4=1048г.
m(H2SO4)р-ра96\%-ного=1048/0,96=1092г.
V(H2SO4)р-ра 96\%=1092/1,84=593,3мл
3Fe+2O2(t) = Fe3O4
2Fe+3Cl2(t) =2FeCl3
CuSO4+Fe=FeSO4+Cu
Fe+2HCl=FeCl2+H2
2Fe+6H2SO4(t) =Fe2(SO4)3+3SO2+6H2O
Fe+S(t) =FeS
Fe+6HNO3(t) =Fe(NO3)3+3NO2+3H2O
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а)Разбавленная:
3Сu+8HNO3(разб)=3Cu(NO3)2+2NO+4H2O
Cu(0)-2e=Cu(+2)|3
N(+5)+3e=N(+2) |2
б) Концентрированная
Сu+4HNO3(конц)=Cu(NO3)2+2NO2+2H2O
Cu(0)-2e=Cu(+2)|1
N(+5)+1e=N(+4) |<span>2 </span>