The oxides of transition metals will be acidic , basic or amphoteric as camparative with its oxidation state. The follow following trends.
Trends (1): The higher oxidation state of the central metal atom , the more covalent character and oxide will be more acidic in nature.
Trends (2): The Lower oxidation state of the central metal atom , the more ionic character and oxide will be more basic in nature.
Trends (3): The moderate oxidation of central metal atom oxide will be amphoteric in Nature .
Oxidation State | Nature of Oxides |
+1 , +2 , +3 | Basic ,Except Cr2O3 |
+4 | Amphoteric e.g. MnO2 |
+5, +6, +7 | Acidic,V2O5,CrO3,MoO3,Mn2O7,OsO4 |
Example of oxides of (Mn):
Oxides | Oxidation state | Nature |
MnO | +2 | Basic |
MnO2 | +4 | Amphoteric |
Mn2O7 | +7 | Acidic |
Example of oxides of (Cr):
Oxides | Oxidation state | Nature |
CrO | +2 | Basic |
Cr2O3 | +3 | Amphoteric |
CrO3 | +6 | Acidic |
(1) Normal Oxides:
(2) Sesqui Oxides:
(3) Mixed Oxides:
(4) Peroxides:
(5) Super Oxides:
(6) Suboxides:
(7) Perovskites:
(8) Spinel Oxides:
(9) Cage like Oxide:
Others oxides
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