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Finiseaza si egaleaza ecuatiile:
NaOH+HCl ->
H2SO4+Zn ->
MgO+H2SO4 -> MgSO4+H2O+Q
HCl+Zn ->
H2SO4+Zn ->
Mg(OH)2+HCl ->MgCl2+H2O
CaCO3+HCl -> CO2+H2O+CaCl2
CuSO4+KOH-> Cu(OH)+ ?
Cu(OH)2 ->CuO+H2O
Dau coroana!


Răspuns :

NaOH+HCl=NaCl+H2O
H2SO4+Zn=ZnSO4+H2
MgO+H2SO4=MgSO4+H2O
2HCl+Zn=ZnCl2+H2
H2SO4+Zn=ZnSO4+H2
celelante care le-ai facut sunt corecte