Why is water a polar molecule?

+97 votes
asked May 23, 2015 in Science by Justin (790 points)
I was reading through my chemistry textbook the other day and they refer water as a polar molecule. So why is water polar molecule? What does it even mean if it is polar in nature? Thank you for the help.

1 Answer

+23 votes
answered May 28, 2015 by carlee (1,170 points)
Water is a polar molecule because of their bonding structure. For a bond to be polar, two atoms would not equally share a pair of electrons. Imagine two toddlers playing with a toy, with one of the children acting like a bully and playing with the toy more.

Water is made up of 2 hydrogens and 1 oxygen (H2O), with the oxygen atom monopolising the electrons. The oxygen is said to be electronegative as it is more negatively charged, thus attracts the single electron of each hydrogen. In addition, water could not be formed in a linear structure as the hydrogen atoms would have to be at the same side of the oxygen atom, in order for it to “share” the electrons. Therefore, water is a polar molecule due to the way it’s structurally bonded.
commented Jun 6, 2015 by Karl (440 points)
Now I understand why is water a polar molecule.
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