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Verified answer

CuCO₃ ⇒ CuCl₂⇒ Cu(OH)₂⇒ CuSO₄
CuCO₃ + 2HCl = CuCl₂ + H₂O + CO₂
CuCO₃ + 2H⁺ + 2Cl⁻ = H₂O + CO₂
CuCO₃ + 2H⁺ = H₂O + CO₂

CuCl₂ + 2NaOH = 2NaCl + Cu(OH)₂ осадок
Cu²⁺ + 2Cl⁻ + 2Na⁺ + 2OH⁻ = 2Na⁺ + 2Cl⁻ + Cu(OH)₂ осадок
Cu²⁺ + 2OH⁻ =  Cu(OH)₂ осадок

Сu(OH)₂ + H₂SO₄ = CuSO₄ + 2H₂O
Сu(OH)₂ + 2H⁺ + SO₄²⁻ = Cu²⁺ + SO₄²⁻ + 2H₂O
Сu(OH)₂ + 2H⁺  = Cu²⁺ + 2H₂O