Объяснение:
1)
H₂SO₄+CuO=CuSO₄+H₂O
CuSO₄+2KOH=Cu(OH)₂+K₂SO₄
Cu(OH)₂+H₂SO₄=CuSO₄+2H₂O
2)
FeS+2HNO₃=H₂S+Fe(NO₃)₂
H₂S+2KOH=K₂S+2H₂O
K₂S+CuSO₄=CuS+K₂SO₄
Объяснение:
1)
H₂SO₄+CuO=CuSO₄+H₂O
CuSO₄+2KOH=Cu(OH)₂+K₂SO₄
Cu(OH)₂+H₂SO₄=CuSO₄+2H₂O
2)
FeS+2HNO₃=H₂S+Fe(NO₃)₂
H₂S+2KOH=K₂S+2H₂O
K₂S+CuSO₄=CuS+K₂SO₄