Write balanced chemical equations for all reactions in the sequence. Water and NO2 (g) are produced in the first step:
(1) Cu(s) ----HNO3----> Cu(NO3)2 (aq)
(2) Cu(NO3)2 (aq) ----NaOH---> Cu(OH)2 (s)
(3) Cu(OH)2 (s) ----heat---> CuO (s)
(4) CuO(s) ----H2SO4---> CuSO4 (aq)
(5) CuSO4 (aq) ----Zn---> Cu(s)