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What does it mean when we say that water is a polar molecule?

Answer 1

This means that in the water molecule, one side is positively charged and the other side is negatively charged.

Since the water molecule (comprising two atoms of Hydrogen and one of Oxygen) is formed by covalent bonds, the electrons are shared.

This sharing causes the electrons to stay closer to the oxygen atom giving it a slight negative charge while the hydrogen atoms, as a consequence, have a slight positive charge.

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Answer 2

Owen Ambrose

When we say water is a polar molecule, it means that the molecule has a partial positive charge on one end (the hydrogen atoms) and a partial negative charge on the other end (the oxygen atom) due to differences in electronegativity.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.