What does the solubility of KNO3 depend on?
This is to do with the fact that
Ionic compounds dissolve in water and covalent compounds do not. The best example of this is NaCl (Sodium Chloride: table salt) - this is an ionic salt and dissolves readily in water. A covalent compound such as sand (Silicon Dioxide:
This happens because the dipole water molecules attract the positive and negative ions and split them apart - in covalent compounds such as
On a side note: a dipole is a molecule or atom where there is a greater concentration of electrons in one area than another - this causes one side to be slightly positive and the other side to be slightly negative. For example, if you imagine a Helium atom (which has two electrons) - and both of the electrons are at the left side of the atom, the right side will have none. This causes the side with more electrons to have a slightly negative charge, and the side with less to have a slightly positive charge.
In the case of ionic breakdown, then, the positive side of the water molecules attracts the negative