To dissolve one ionic compound, the water molecule must have the ability to stabilize the ions that result from breaking the ionic bond.

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They perform this by hydrating the ions.

Water is a polar molecule. It has actually a irreversible dipole.

The #"O"# atom has actually a partial an adverse charge, and the #"H"# atoms have a partial positive charge.

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When you ar an ionic substance in water, the water molecules lure the hopeful and an adverse ions from the crystal.

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The particles room then complimentary to move approximately within the solution.

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(from 2012books.lardbucket.org)

The positive ions have actually several water molecules roughly them, all through their #"O"# atoms close come the hopeful ion.

The an adverse ions have actually several water molecules approximately them, all through their #"H"# atoms close to the an adverse ion.

The "shell" that water molecule reduces the attractions in between the ions. The ions space hydrated.

Here"s a video that shows the procedure in action.


Answer attach
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R-Rahaman Raza
Nov 29, 2015

Ionic compounds dissolve in water due to the difference in between its lattice energy and its hydration energy.


An ionic compound consists of 2 oppositely charged ions. Water, meanwhile is a polar solvent; the electronegativity difference in between oxygen and hydrogen is high which is why water has a confident pole of #H# and also a an unfavorable pole #O# (water is #H_2O#).

What wake up is, as soon as an ionic link is put in water, the an adverse ion, or the anion, attracts the hopeful #H# pole about it, and the positive ion, or the cation, attracts the an adverse #O# pole roughly it. This outcomes in the development of a unique setup called the hydration.

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Hydration releases energy, which is known as the hydration energy. Every ionic compound has an power holding the lattice framework of the compound, recognized as lattice energy. If the hydration energy of one ionic compound exceeds that lattice energy, the lattice is broken and also the ion in the compound separate, causing the compound to dissolve. If the hydration power of the compound is lesser 보다 the lattice energy, the compound will certainly not dissolve.