The hydroxides are definite compounds and not just hydrated oxides. What does it mean.
Dear Student,
There is a difference between these two terms, hydrated oxides and hydroxides.
Hydrated oxides are those oxides which have water bound to them just like water of crystallization. For example, Fe2O3 is ferric oxide. It does not contain water so, it is called anhydrous. When water is bound to it, it becomes Fe2O3. 3H2O, it becomes hydrated and can be called as hydrated oxide.
Hydroxide is an anion with formula OH-. It is a basic radical and exists in compounds. For example, Ferric hydroxide, Fe(OH)3. In this hydroxide is present as a basic radical. Hydroxides are formed when any metal reacts with water or any strong alkali. These are mostly alkaline in nature.
A hydrated oxide may get converted to hydroxide with time.
As per the statement given in the image posted, the meaning is the metal M forms hydroxides independently as M(OH)3 and not only by hydrating its oxides.
Regards
There is a difference between these two terms, hydrated oxides and hydroxides.
Hydrated oxides are those oxides which have water bound to them just like water of crystallization. For example, Fe2O3 is ferric oxide. It does not contain water so, it is called anhydrous. When water is bound to it, it becomes Fe2O3. 3H2O, it becomes hydrated and can be called as hydrated oxide.
Hydroxide is an anion with formula OH-. It is a basic radical and exists in compounds. For example, Ferric hydroxide, Fe(OH)3. In this hydroxide is present as a basic radical. Hydroxides are formed when any metal reacts with water or any strong alkali. These are mostly alkaline in nature.
A hydrated oxide may get converted to hydroxide with time.
As per the statement given in the image posted, the meaning is the metal M forms hydroxides independently as M(OH)3 and not only by hydrating its oxides.
Regards