Write the molecular and ionic equations of the reactions Na2O – NaOH – NaCl – Na- NaBr

Write the molecular and ionic equations of the reactions Na2O – NaOH – NaCl – Na- NaBr NaOH – Cu (0H) 2 – CuO – Cu

1) Na₂O + H₂O → 2NaOH;

2Na⁺ + O^2- + H₂O → 2Na⁺ + 2OH^–;

O^2- + H₂O → 2OH^–;
2) NaOH + HCl → NaCl + H₂O;

2Na⁺ + OH^– + H⁺ + Cl^– → 2Na⁺ + Cl^– + H₂O;

OH^– + H⁺ → H₂O;
3) 2NaCl → 2Na + Cl₂↑;
4) 2Na + Br₂ → 2NaBr;
5) 2NaBr + 2H₂O → 2NaOH + H₂↑ + Br₂  ;

2Na⁺ + 2Br^– + 2H₂O → 2Na⁺ + 2OH^– + H₂↑ + 2Br-;

+ 2H₂O → 2OH^– + H₂↑;
6) 2NaOH + CuSO₄ → Cu(OH)₂↓ + Na₂SO₄;

2Na⁺ + 2OH^– + Cu²⁺ + SO₄^2- → Cu(OH)₂↓ + 2Na⁺ + SO₄^2-;

2OH^– + Cu²⁺ → Cu(OH)₂↓;
7) Cu(OH)₂↓ → CuO + H₂O;
8) CuO + H₂↑ → Cu + H₂O.