CuSO4 + 2NaOH = Cu(OH)2↓ + Na2SO4
Cu[2+] + SO4[2-] + 2Na[+] + 2OH[-] = Cu(OH)2↓ + 2Na[+] + SO4[2-]
Cu[2+] + 2OH[-] = Cu(OH)2↓
CuO + H2SO4 = CuSO4 + H2O
CuSO4 + 2NaOH = Cu(OH)2↓ + Na2SO4
Cu[2+] + SO4[2-] + 2Na[+] + 2OH[-] = Cu(OH)2↓ + 2Na[+] + SO4[2-]
Cu[2+] + 2OH[-] = Cu(OH)2↓
CuO + H2SO4 = CuSO4 + H2O