Metal-containing compounds can be converted to metals Anode M Transforming the metal- containing compoundto a metal is less energy Sheets of Anode sludge Sheets of ntensive Solution copper containing oure Transforming the metal CUSO4 copper containing compoundto a metal is more energy Fig 18.21 high-purity copper is recovered by intensive electrolysis. Pure copper metal deposits on the negative electrode as copper ions in solution gain electrons. The source of these copper ions is a positively charged electrode made of Impure copperMetal-containing compounds can be converted to metals Sheets of impure copper Sheets of pure copper Solution containing CuSO4 Transforming the metal￾containing compound to a metal is less energy intensive Transforming the metal￾containing compound to a metal is more energy intensive Fig 18.21 high-purity copper is recovered by electrolysis. Pure copper metal deposits on the negative electrode as copper ions in solution gain electrons. The source of these copper ions is a positively charged electrode made of impure copper