1) Ag -> Ag2O -> AgCl -> AgSO42) Na -> Na2O -> NaOH -> NaCl -> Na2SO43) K -> K2O -> KOH -> KCl -> K2SO44) Na + H3PO45) Fe + H2SO46) Zn + HNO3 (redox reaction)
1) Ag -> Ag2O -> AgCl -> AgSO4
2) Na -> Na2O -> NaOH -> NaCl -> Na2SO4
3) K -> K2O -> KOH -> KCl -> K2SO4
4) Na + H3PO4
5) Fe + H2SO4
6) Zn + HNO3 (redox reaction)