Question

CaO+PbS=? CaO+P2O5=? CaO+H2CO3=? CaO+ZnSO4=? CaO+Cu=?

Answer 1

По-моему последняя реакция не идёт, т.к. медь стоит после кальция в ряду активности металов

Answer 2

CaO + PbS

When calcium oxide (CaO) reacts with lead(II) sulfide (PbS), it forms calcium sulfide (CaS) and lead(II) oxide (PbO).

The balanced chemical equation for this reaction is:

CaO + PbS → CaS + PbO

CaO + P2O5

When calcium oxide (CaO) reacts with phosphorus pentoxide (P2O5), it forms calcium phosphate (Ca3(PO4)2).

The balanced chemical equation for this reaction is:

3CaO + P2O5 → Ca3(PO4)2

CaO + H2CO3

When calcium oxide (CaO) reacts with carbonic acid (H2CO3), it forms calcium carbonate (CaCO3) and water (H2O).

The balanced chemical equation for this reaction is:

CaO + H2CO3 → CaCO3 + H2O

CaO + ZnSO4

When calcium oxide (CaO) reacts with zinc sulfate (ZnSO4), it forms calcium sulfate (CaSO4) and zinc oxide (ZnO).

The balanced chemical equation for this reaction is:

CaO + ZnSO4 → CaSO4 + ZnO

CaO + Cu

When calcium oxide (CaO) reacts with copper (Cu), it forms calcium copperate (CaCuO2).

The balanced chemical equation for this reaction is:

2CaO + 2Cu → CaCuO2

Please note that the reactions mentioned above are simplified representations and may not account for all possible products or reaction conditions.