What is the difference between the terms 'hydrolysis' and 'hydration'?

Explanation

Hydrolysis refers to the reaction of salt with water to form acidic or basic solutions. For example:
`Na_(2)CO_(3) + 2H_(2)O hArr underset("basic solution")(2[Na^(+) + OH^(-) ]) + H_(2)CO_(3)`,
`NH_(4)Cl + H_(2)O hArr underset("acidic solution")([H^(+) + Cl^(-) ]) + NH_(4)OH`,
Hydration, on the other hand, refers to the addition of `H_(2)O` to ions or molecules to form hydrated ions or hydrated salts. For example,
`underset("Salt")(NaCl(s)) + H_(2)O rarr underset("Hydrated ions")ubrace(Na^+ (aq) +Cl^(-)(aq))`
`underset("Anhydrous salt (colourless)")(CuSO_(4)(s)) + 5 H_(2)O(l) rarr underset("Hydrated salt (blue)")(CuSO_(4)cdot 5H_(2)O(s))`