2nd October 2019


Why are polar molecules important?

Water's polarity allows it to dissolve other polar substances very easily. When a polar substance is put in water, the positive ends of its molecules are attracted to the negative ends of the water molecules, and vice versa. The dissolving power of water is very important for life on Earth.

Regarding this, what are polar molecules attracted to?

This polarity makes water molecules attracted to each other. Explain that the oxygen-hydrogen (O–H) bond in the alcohol molecule is also polar. But, the carbon-hydrogen (C–H) bonds in the rest of the alcohol molecule are nonpolar. In these bonds, the electrons are shared more or less evenly.

What does it mean to be a polar molecule?

Water is a "polar" molecule, meaning that there is an uneven distribution of electron density. Water has a partial negative charge ( ) near the oxygen atom due the unshared pairs of electrons, and partial positive charges ( ) near the hydrogen atoms.
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