Overall, a water molecule has no charge but it is a polar molecule. What makes water polar and how does it's polarity contribute to hydrogen bonding?
What will be an ideal response?
Each of the hydrogen atoms in a water molecule bears a slight positive charge and the oxygen atom carries a slight negative charge, making water polar. This happens due to polar covalent bonds between oxygen and hydrogen. Oxygen is a slightly more electronegative than hydrogen. It pulls the electrons a little more toward its side of the bond, so that atom bears a slight negative charge. Therefore, the hydrogen bears a slight positive charge.
The polarity of individual water molecules attracts them to one another. The slight positive charge of a hydrogen atom in one water molecule is drawn to the slight negative charge of an oxygen atom in another. This type of interaction is called a hydrogen bond.
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