AP BIOLOGY

Detailed explanation-1: -Generally speaking, water is good at dissolving ions and polar molecules, but poor at dissolving nonpolar molecules. (A polar molecule is one that’s neutral, or uncharged, but has an asymmetric internal distribution of charge, leading to partially positive and partially negative regions.)

Detailed explanation-2: -Water Is an Excellent Solvent Because water is polar, with slight positive and negative charges, ionic compounds and polar molecules can readily dissolve in it.

Detailed explanation-3: -The positively-charged side of the water molecules are attracted to the negatively-charged chloride ions and the negatively-charged side of the water molecules are attracted to the positively-charged sodium ions.

Detailed explanation-4: -Water is a Polar Covalent Molecule The unequal sharing of electrons between the atoms and the unsymmetrical shape of the molecule means that a water molecule has two poles-a positive charge on the hydrogen pole (side) and a negative charge on the oxygen pole (side).