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a) Pb(OH)₂ + H₂S ---> PbS + 2H₂O
b) Pb + H₂S ---> PbS + H₂
c) PbO + H₂S ---> PbS + H₂O
Azotan(V) miedzi(II)
a) Cu(OH)₂ + 2HNO₃ ---> Cu(NO₃)₂ + 2H₂O
b) Brak reakcji
c) CuO + 2HNO₃ ---> Cu(NO₃)₂ + H₂O
Chloran(V) żelaza(III)
a) Fe(OH)₃ + 3HClO₃ ---> Fe(ClO₃)₃ + 3H₂O
b) 2Fe + 6HClO₃ ---> 2Fe(ClO₃)₃ + 3H₂
c) Fe₂O₃ + 6HClO₃ ---> 2Fe(ClO₃)₃ + 3H₂O