# Dielectric constant and dissolution of ionic salts

We say that salts like $\ce{NaCl}$ get easily dissolved in water because the dielectric constant of water is very high. I know the dielectric constant of water is 81 and if a salt is put into water the force between $\ce{Na+}$ and $\ce{Cl-}$ ions gets reduced by 1/81 times, after that the salt can easily be dissolved by simply stirring.

But how can we say that the medium between two very small particles which are bonded together is water? How can water molecules be present between two strongly bonded ions?

• Have you heard about solvation process if not then go check it – Mahin Apr 16 '17 at 6:36
• I guess I've never seen it said that salts dissolve because of the dielectric constant of water (which really isn't particularly high). There is some confusion somewhere in your line of reasoning. – Jon Custer Apr 16 '17 at 14:19
• – Gaurang Tandon May 1 '18 at 5:53
• Do not use a too mechanical model. I see the point of your concern. This happens all the time at such a scale. Is like asking how a reaction "knows" how to proceed towards lower energy before actually doing it. – Alchimista Dec 19 '18 at 12:11