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Between H2O and HF, which has more dipole moments, and why?

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Both fluoride and oxygen are very electronegative. When they bond with hydrogen the hydrogen becomes slightly positive and the electronegative atom slightly negative. In water there are two hydrogen atoms making more charge dipoles for net greater magnitude of dipole moment. read more

Dipole moment is high in such compound which has it's polarity towards it's central atom. Flourine is more electronegative than all other elements, therefore when it will be present in any compound, dipole moment will be towards itself only. So in NF3 and OF2 the dipole moment is less because flourine is not a central atom. read more

On the other hand, $\ce{H2O}$ is "bent", which means that the individual dipole moments of the bond are at an angle to each other. They add up to give a net dipole moment (shown with grey in the diagram). read more

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Between H2O and HF, which has more dipole moments, and why ...
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