What is the difference between the terms ‘hydrolysis’ and ‘hydration’?

Hydrolysis is defined as a chemical reaction in which hydrogen and hydroxide ions (H+ and OH- ions) of water molecule react with a compound to form products. For example:

CaO + H2O Ca (OH) 2


Hydration is defined as the addition of one or more water molecules to ions or molecules to form hydrated compounds. For example:


CuSO4 + 5H2O CuSO4.5H2O


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