Dissolving Salt In Water 3D Animation
In this video, we will explain the process to dissolve salt in water.
The salt is usually in solid-state and crystals forms.
If we were able to see inside of a crystal of salt we will find that it has a lot of ions, but just two different kinds, some of them are ion Sodium and the others are ion Chloride. They are joined for a very strong bond because Sodium loses an electron becoming a positive ion (Na+) and Chlorine atoms gain that electron to become negative ion, chloride (Cl-)
In contrast in the water, there are no ions but covalent molecules, they are not fixed to a position in the space, instead, they are moving constantly, interacting with other water molecules and with the wall’s container.
Each water molecule contains two hydrogen atoms and one oxygen atom and because they have different but very close electronegativity they have a slightly negative charge on the oxygen atom and a positive charge by the hydrogen atoms. This means that when they interact with each other, the positive charge will be oriented to the negative charge, in other words, the oxygen will be closer to the hydrogen of the next water molecule.
Now, what happens when molecules of water are in front of crystal salt?, well the oxygens surround the positive ions (Na+) and the hydrogens do the same with the negative ions (Cl-). They take them outside of the crystal and the solid disappears becoming part of the liquid or solution, in this case, a solution of salt in water.