anion & cation rule

1. Chloride ion ;Cl- Bromide ion ;Br- Iodide ion ;I-

1.1. Ag+, Pb2+, Hg2 2+, Cu+

1.2. All other positive ions

2. Sulfate ion ; SO4 2-

2.1. Ba2+, Sr2+, Pb2+

2.2. All other positive ions

3. Sulfide ion ; S2-

3.1. Alkali ions, H+, NH4 +, Be2+, Mg2+, Ca2+, Sr2+, Ba2+

3.2. All other positive ions

4. Hydroxide ion ;OH-

4.1. Akali ions, NH4 +, Sr2+, Ba2+

4.2. All other positive ions

5. Phosphate ion ;PO4 3- Carbonate ;CO3 2- Sulfite ion ;SO3 2-

5.1. Alkali ions, H+, NH4 +

5.2. All other positive ions

6. All negative ions

6.1. Alkali ions (Li, Na, K etc.)

6.2. Hydrogen (H+)

6.3. Ammonium ion (NH4+)

7. All positive ions

7.1. Nitrate No3 - ions

7.2. Acetate CH3COO - ions