Water is a polar molecule, meaning it carries partial charges (δ + or δ - ) on opposite sides of the molecule. For two formula units of NaCl, place the sodium ions and chloride ions where they would most likely appear based on the grouping of the water molecules in the areas provided. Note that red spheres represent O atoms and white spheres represent H atoms.

Explanation

On each side of the water molecule that the oxygen atom is exposed to is slightly negative.

While the side of each water molecule with the hydrogen atoms exposed will be slightly positive.

Therefore, the two Cl{-} ions will be attracted to the largest number of positive charges, and this will occur in the boxes on the upper right and lower left.

While the two Na{+} ions will be attracted to the largest number of negative charges, that occur in the boxes on the upper left and lower.

The sodium molecules (Na + ) will side with the Oxygen molecules (O-), while the chlorine molecules (Cl-) will side with the hydrogen molecules (H + ).

Explanation:

As you know, NaCl is a polar substance, since it can establish ionic bonds with a water molecule (H2O), allowing it to be completely dissolved by it.

As you may already know, the water molecule has an electronic gradient. This is because the oxygen molecule is very electronegative, pulling the two hydrogen molecules, fortiment. This causes the water molecule to create poles: a negative pole on the oxygen side and a positive pole on the hydrogen side.

When NaCl comes into contact with water, positive Na + molecules are attracted to the negative pole of the water molecule, while negative Cl - molecules are attracted to the positive pole of the water molecule.