Question

К→КОН→Cu(OH)2 → CuO → CuSO4​

Answer 1

2K + 2H2O --> 2KOH + H2↑

2KOH + CuSO4 --> K2SO4 + Cu(OH)2↓

Cu(OH)2 (t*)--> CuO + H2O

CuO + H2SO4 --> CuSO4 + H2O