Cation & Anion Polarity

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Kassandra Molina 2B
Posts: 43
Joined: Wed Nov 16, 2016 3:03 am

Cation & Anion Polarity

Postby Kassandra Molina 2B » Mon Nov 13, 2017 10:09 pm

Does the polarizing power of a cation or anion depend on its size? i.e. the smallest cation or largest anion is the most polarizable?

Maeve Gallagher 1J
Posts: 56
Joined: Fri Sep 29, 2017 7:07 am

Re: Cation & Anion Polarity

Postby Maeve Gallagher 1J » Mon Nov 13, 2017 10:13 pm

Yes! Large anions are highly polarizable because they have many electrons far from the nucleus that are easily distorted. On the other hand, small cations have a high polarizing power because they cause large distortions.

Alyssa Pelak 1J
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Re: Cation & Anion Polarity

Postby Alyssa Pelak 1J » Mon Nov 13, 2017 10:15 pm

Yes, it does. The highest polarizing power comes from the smallest, most highly charged cations. And, the highest polarizability comes from the largest anions.

Peri Bingham 1G
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Joined: Fri Sep 29, 2017 7:03 am

Re: Cation & Anion Polarity

Postby Peri Bingham 1G » Tue Nov 21, 2017 6:47 pm

In smaller cations, the positively charged nucleus is closer to the outer shell. Therefore it has more power (polarizing power) to draw in an anion and distort it. In large anions, the positively charged nucleus is farther from the outer shell. There for it has less power (easily polarizable) to keep to keep the electrons close which allow the anion to become distorted.


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