Which of the following substances does the sodium hydroxide solution react with: barium oxide, calcium, sulfur oxide (VI)

Which of the following substances does the sodium hydroxide solution react with: barium oxide, calcium, sulfur oxide (VI), copper (II) chloride? Make equations of possible reactions in molecular and ionic form.

2NaOH + SO₂ = Na₂SO₃ + HO₂; 2Na ++ 2OH- + SO₃ = Na₂SO₃ + H₂O
2NaOH + CuCl₂ = 2NaCl + Cu (OH) ₂; 2Na ++ 2OH- + Cu2 ++ 2Cl- = 2Na ++ 2Cl- + Cu (OH) ₂

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