A dehydrated salt can be rehydrated.
No, it is not a hydrate.
no
This is a reversible process.
Is decomposition reaction reversible, it is not. Once something has decomposed, its cells are broken down and cannot be reconstructed. This would be most apparent in decomposition of flesh.
In a closed container at normal temperature it is reversible but at high temperature it is irreversible reaction.
When a hydrate is heated, the water, h20 is evaporated, leaving only the anhydrous salt. If you add water to a anhydrous salt, it will transition back into a hydrate.
It is reversible. You can allow the water to evaporate, leaving the salt behind.
Reversible Reaction
No it is not reversible because the salt disolves and cannot come back !
Anhydrous salt
By heating this hydrate.
Anhydrous is the term for a hydrate with water heated off. when a hydrated salt is heated, it loses water of crystallization leaving an anhydrous salt.