Question

Сu→СuO→CaSO4→Cu(OH)2​

Answer 1

2Cu + O₂= 2CuO

CuO + H₂SO₄ = CuSO₄ + H₂O

CuSO₄ + 2KOH =Cu(OH)₂ + K₂SO₄

Cu(OH)₂ = CuO + H₂O

Answer 2

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