<P> Water is particularly common solvent to be found in crystals because it is small and polar . But all solvents can be found in some host crystals . Water is noteworthy because it is reactive , whereas other solvents such as benzene are considered to be chemically innocuous . Occasionally more than one solvent is found in a crystal , and often the stoichiometry is variable , reflected in the crystallographic concept of `` partial occupancy . '' It is common and conventional for a chemist to `` dry '' a sample with a combination of vacuum and heat `` to constant weight . '' </P>
<P> Water is particularly common solvent to be found in crystals because it is small and polar . But all solvents can be found in some host crystals . Water is noteworthy because it is reactive , whereas other solvents such as benzene are considered to be chemically innocuous . Occasionally more than one solvent is found in a crystal , and often the stoichiometry is variable , reflected in the crystallographic concept of `` partial occupancy . '' It is common and conventional for a chemist to `` dry '' a sample with a combination of vacuum and heat `` to constant weight . '' </P>
one of most common solvent used for crystallization is
one of most common solvent used for crystallization is
Water
Water