I

• Ag

Ag⁺ + Fe²⁺ Ag + Fe³⁺

AgSCN + SCN^- Ag(SCN)₂^-

2Ag⁺ + S₂O₃^2-AgS₂O₃

• Pb

PbO₂ + 2H₂O + 2H⁺Pb²⁺+O₂ + 2H₂O

PbCl₂+2Cl^-PbCl₄

PbCl₄+H₂SO₄Pb²⁺ + 2HSO₄^-

• Hg

Hg(SCN)₂+2SCN^-Hg(SCN)₄^2-

Hg₂²⁺+Cu2Hg+Cu²⁺

Hg₂Cl₂+SnCl₂2Hg+SnCl₄

IIA

• Bi

Bi + NO₃^- + 4H⁺ Bi³⁺+NO+2H₂O

2Bi+6H₂SO₄2Bi³⁺ +3SO₄^2-+3SO₂+6H₂O

2Bi+6HCl+3H₂O₂2BiCl₃+6H₂O

• Cu

3Cu+2NO₂^-+8H⁺3Cu²⁺+2NO+4H₂O

Cu+2H₂SO₄Cu²⁺+SO₄^2-+SO₂+2H₂O

Cu(SCN)₂+2SCN^-Cu(SCN)₄^2-

• Cd

Cd+2H⁺Cd²⁺+H₂

2Cd²⁺+Fe(CN)₆^4-Cd₂[Fe(CN)₆]

Cd₂[Fe(CN)₆]+12H⁺2Cd(NH₃)₆²⁺+

+Fe(CN)₆^4-

Cd²⁺+2S₂O₄^2-Cd(S₂O₄)₂^2-

IIB

• As

As₂O₃+6OH^-6AsO^3-+3H₂O

3As+5HNO₃+2H₂O3H₃AsO₄+5NO

AsO₃^3-+3Ag⁺Ag₃AsO₃

• Co

Co²⁺+4SCN^-Co(SCN)₄^2-

Co²⁺+7NO₂^-+3K⁺+2H⁺K₂[Co(NO₂)₆]+NO+H­₂O

Co²⁺+Hg(SCN)₄^2-Co[Hg(SCN)₄]

III

• Ni

2Ni(OH)_2­+ClO^-+H₂O2Ni(OH)₃+Cl^-

2Ni²⁺+Fe(CN)₆^4-Fe[Ni(CN)₆]

Ni+2H⁺Ni²⁺+H­₂

• Zn

Zn+2OH^-ZnO₂^2-+H_2­

Zn²⁺+Hg(SCN)₄^2-Zn[Hg(SCN)₄]

3Zn²⁺+2K⁺+2Fe(CN)₆^4-K₂Zn₃[Fe(CN)₆]₂

• Mn

2Mn²⁺+2NaBiO₃+14H⁺2MnO₄^-+5Bi³⁺+5Na⁺+7H₂O

2Mn²⁺+5PbO₂+4H⁺2MnO₄^-+5Pb²⁺+2H₂O

2Mn²⁺+5S₂O₃^2-+8H₂O2MnO₄^-+10SO₄^2-+16H⁺

• Fe

4Fe³⁺+3Fe(CN)₆^4-Fe₄[Fe(CN)₆]₃

Fe₄[Fe(CN)₆]₃+12OH^-4Fe(OH)₃+3Fe(CN)₆^4-

3Fe³⁺+2Fe(CN)₆^3- Fe₃[Fe(CN)₆]₂

• Cr

2Cr(OH)₄^-+3H₂O₂+2OH^-2CrO₄^2-+8H₂O

2Cr³⁺+NaBiO₃+4H⁺Cr₂O₇^2-+2Br³⁺+3Na⁺+2H₂O

Cr₂O₇^2-+4H₂O₂+2H⁺2CrO₅+5H₂o

• Al.

2Al(Ch₃COO)₃+2H₂OAl.(OH)₂CH₃COO+

2CH₃COOH

Al.(OH)₄^-+NH₄⁺Al(OH)₃+NH₃+H­₂O

2Al₂(SO₄)₃+2Co(NO₃)₂2Co(AlO₂)₂+6SO₃+4N₂+O₂

IV

• Ca

Ca²⁺+2NH₄^-+Fe(CN)₆^4-Ca(NH₄)[Fe(CN)₆]

Ca+2H₂OCa(OH)₂+H₂

Ca+2H⁺Ca²⁺+H₂

• Sr

Sr²⁺+Ca²⁺+SO₄^2-SrSO₄+Ca²⁺

Sr²⁺+CrO₄^2-SrCrO₄

• Ba

Ba+2H₂OBa(OH)₂+H₂

Ba²⁺+Ca²⁺+SO₄^2-BaSO₄+Ca²⁺

Ba²⁺+CrO₄^2-BaCrO₄

• K

2K+2H­­₂O2K⁺+2OH^-+H₂

2K+2C₂H₅OH2C₂H₅O^-+2K⁺+H₂

2K⁺+Na⁺+Co(NO₂)₆K₂Na[Co(NO₂)₆]