Zn→ZnCl₂→ Zn(OH)2 → ZnO→ ZnSO4→ CaSO4

Zn+2 HCl = ZnCl2+H2

ZnCl2+2 NaOH = Zn(OH)2+2 NaCl

Zn(OH)2 = ZnO+H2O

ZnO+H2SO4 = ZnSO4+H2O

ZnSO4+Ca(NO3)2 = Zn(NO3)2+CaSO4