So you didn't think carefully, Centrifuge 
A NaCl crystal does not contain NaCl molecules. It's simply a grid of Na+ and Cl- ions.
Check your textbook in inorganic chemistry if you don't believe me

A NaCl crystal does not contain NaCl molecules. It's simply a grid of Na+ and Cl- ions.
Check your textbook in inorganic chemistry if you don't believe me

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