H2S → X → K2SO3 → CaSO3
+ O2
ZnS → Х → ZnCl2 → Zn(OH)2
Рb(ОН)2 → X → Рb(NОЗ)2 → Рb
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H2S → X → K2SO3 → CaSO3
+ O2
ZnS → Х → ZnCl2 → Zn(OH)2
Рb(ОН)2 → X → Рb(NОЗ)2 → Рb
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Answers & Comments
1)2H2S+3O2=2H2SO3
H2SO3+2KCl=K2SO3+2HCl
K2SO3+CaCl2=CaSO3+2KCl
2)2ZnS+3O2=2ZnO+2SO2
ZnO+2HCl=ZnCl2+H2O
ZnCl2+2NaOH=Zn(OH)2+2NaCl
3)Pb(OH)2+2HCl=PbCl2+2H2O
PbCl2+2HNO3=Pb(NO3)2+2HCl
Pb(NO3)2+H2=Pb+2HNO3