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Ionic Solubility in Water

Most ionic compounds show a high solubility, meaning they can be dissolved in water. They dissociate into their ions when dissolved into water. The charged ions interact with the partially negative oxygen and partially positive hydrogen in H2O.

On the left is a chlorine anion surrounded by water molecules. The hydrogen atoms in water point towards the chlorine anion, and the oxygen atom points away from the chlorine anion. This is because the anion is negatively charged and hydrogens are partially positive. On the right is a sodium cation surrounded by water molecules. The oxygen atoms in water point towards the sodium cation and the hydrogen atoms point away from the sodium cation. This is because the cation is positively charged and oxygens are partially negative.

Figure 1: NaCl dissolved in water.

Referred from:

Article
Electrolytic conductivity