Question

URGEEENT!!!
rezolvarea reactiillor de descompunere:
HgO ->
CuCO3 ->
CaCO3 ->
KClO3 ->
H2O ( electroliza ) ->
rezolvarea reactiilor de inlocuire:
Na+H2O ->
Zn+H2O ->
K + Hcl ->
Fe+ H2SO4 ->
Al + Fe2O3 ->
Zn + PbO2 ->
Fe+ CuSO4 ->
Mg + Fe(NO3)2 ->
rezolvarea reactiilor de schimb:
H2SO4+NaCl ->
HCl+ CaCO3 ->
NaOH + CuSO4 ->
NaOH +FeCl3 ->
NaOH + FeSO4 ->
NaOH + HCl ->
H2SO4+ KOH ->
CaO + HNO3 ->
Al2O3+ H2SO4->
Ca(OH)2 + CO2 ->

Answer 1

TREBUIE SA INVETI DEFINITIILE ACESTOR TIPURI DE REACTII; reactiile de schimb au loc numai daca rezulta apa, un gaz sau un produs greu solubil