polarizing power vs polarizability

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polarizing power vs polarizability

Postby inlovewithchemistry » Tue Nov 13, 2018 3:27 pm

Can someone explain the difference between polarizing power and polarizability?

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Re: polarizing power vs polarizability

Postby Kristen Kim 2K » Tue Nov 13, 2018 3:31 pm

Polarizing power refers to the ability of cations to cause distortions in an anion. Polarizability could be seen as the opposite end, where it describes the ability of an anion to have their electrons become distorted by a cation.

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Re: polarizing power vs polarizability

Postby EllerySchlingmann1E » Tue Nov 13, 2018 3:33 pm

Polarizing power and polarizability are two halves of the same coin. Polarizing power means the power an atom, ion, or molecule has to polarize, or create a dipole in another atom, ion, or molecule. On the other hand, polarizability denotes how easily a species can be polarized. We tend to talk about cations as having polarizing power and anions as having polarizability because these terms are set in reference to creating negative dipoles.

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Re: polarizing power vs polarizability

Postby Stevin1H » Thu Nov 15, 2018 1:10 am

Polarizing power is referred to atoms and ions that can cause distortions. Polarizing power is usually associated with cations as cations with a small atomic radius and highly charged have highly polarizing power. This is because as these small and highly charged cations get near an anion, the cation exerts a strong pull on the electrons of the anion to cause distortions.

Polarizability refers to atoms and ions with electron clouds that undergo distortions. This is usually connected to anions that experience the distortions. Large anions are usually highly polarizable since the nucleus has a weak pull on the outermost electrons since they are further away. The electron clouds are easier to be distorted when there is a weaker pull on the outermost electrons.

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