Question

Why ionic bond are soluble in water

Answer 1

When ionic bonds form, one atom becomes positively charged (+), and the other one becomes negatively charged (-).

Water is a covalent polar compound (it has positive and negative poles). Also, ionic compound tend to form complex lattice networks and structures (see the picture).

When the salt is put in water, the water is pulling Na+ on one side and Cl− on the other side. The water molecules can pull hard enough to eventually break each salt molecule away from the lattice, dissolving the crystal structure.

Answer 2

It is because water is a polar molecule, that is, Hydrogen atoms have slightly positive charge and oxygen atoms have slightly negative charge. Ionic compounds are crystals with equal numbers of positive and negative ions.

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