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Among NH3, H2O, and HF which would you expect to have highest magnitude of hydrogen bonding and why?

9.14 Among NH3, H2O and HF, which would you expect to have highest magnitude of hydrogen bonding and why?

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R Rakesh

Answer-

The strength of hydrogen bonding depends on the electronegativity of an atom

electronegativity order N<O<F

The expected order should be NH_{3}<H_{2}O<HF

But the  actual order is NH_{3}<HF<H_{2}O

This is because of the extent of H bonding in a water molecule is more due to the presence of one extra hydrogen atom. Also, Oxygen atom forms a huge ring like structure through its high ability of hydrogen bonding

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