Write down the reaction equations: a) Cu → CuO → Cu (OH) 2 → CuCl2 b) Na → Na2O → NaOH → NaCl2

a) 2Cu + O2 => 2CuO
CuO + H2O → Cu (OH) 2
Cu (OH) 2 → CuCl2

b) 4Na + O2 → 2Na2O
Na2O + H2O → 2NaOH
NaOH + HCl → NaCl + H2O



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