Cu->CuCl2->Cu(NO3)2->Cu(OH)2->CuO->CuSO4->CuS->SO2->H2SO3
Cu+Cl2=CuCl2
CuCl2+2 AgNO3=Cu(NO3)2+2 AgCl↓
Cu(NO3)2+2 NaOH=Cu(OH)2+2 NaNO3
Cu(OH)2=CuO+H2O
CuO+H2SO4=CuSO4+H2O
CuSO4+H2S=CuS+H2SO4
2 CuS+3 O2=2 CuO+2 SO2
SO2+H2O=H2SO3
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Cu->CuCl2->Cu(NO3)2->Cu(OH)2->CuO->CuSO4->CuS->SO2->H2SO3
Cu+Cl2=CuCl2
CuCl2+2 AgNO3=Cu(NO3)2+2 AgCl↓
Cu(NO3)2+2 NaOH=Cu(OH)2+2 NaNO3
Cu(OH)2=CuO+H2O
CuO+H2SO4=CuSO4+H2O
CuSO4+H2S=CuS+H2SO4
2 CuS+3 O2=2 CuO+2 SO2
SO2+H2O=H2SO3