Na + NaOH -> NaOH + Na
NaOH + Cu -> Cu + NaOH
Cu + OHOHOH2 -> CuOHOHOH2
CuOHOHOH2 -> CuO + H2O
CuO + H2SO4 -> CuSO4 + H2O
CuSO4 + Cu -> 2CuSO4
Итак, решенная цепочка: Na-NaOH-Cu-OHOHOH2-CuO-CuSO4-CuSO4
Na + NaOH -> NaOH + Na
NaOH + Cu -> Cu + NaOH
Cu + OHOHOH2 -> CuOHOHOH2
CuOHOHOH2 -> CuO + H2O
CuO + H2SO4 -> CuSO4 + H2O
CuSO4 + Cu -> 2CuSO4
Итак, решенная цепочка: Na-NaOH-Cu-OHOHOH2-CuO-CuSO4-CuSO4