Ordering Polarizability and Polarizing Power

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Christopher Tran 1J
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Joined: Fri Sep 28, 2018 12:15 am

Ordering Polarizability and Polarizing Power

Postby Christopher Tran 1J » Wed Dec 05, 2018 1:04 pm

Order these anions in order from least to most polarizable: I-, Cl-, S2-, P3-

Order these cations in order from least to most polarizing power: Li+, Ca2+, Cs+, Ba2+

How would I go about determining the relative sizes of ions? I know that a small cation has high polarizing power, and a large anion is more polarizable.

Shash Khemka 1K
Posts: 38
Joined: Fri Sep 28, 2018 12:18 am

Re: Ordering Polarizability and Polarizing Power

Postby Shash Khemka 1K » Wed Dec 05, 2018 1:13 pm

Anions: P3- < S2- < Cl- < I- ; Smallest to Largest


Cations: Ba2+ < Cs+ < Ca2+ < Li+ ; Largest to Smallest

Ashley Odibo Dis3E
Posts: 31
Joined: Wed Nov 15, 2017 3:03 am

Re: Ordering Polarizability and Polarizing Power

Postby Ashley Odibo Dis3E » Thu Dec 06, 2018 8:24 am

Can someone please explain why this is the order?

Shibhon_Shepard
Posts: 62
Joined: Wed Nov 15, 2017 3:04 am

Re: Ordering Polarizability and Polarizing Power

Postby Shibhon_Shepard » Fri Dec 07, 2018 11:39 am

you determine the order based on the amount of electrons and the size of the atom. for Anions you are looking for the one that is more negativity. and for the cations you are looking for the most positive.

Ashley Odibo Dis3E
Posts: 31
Joined: Wed Nov 15, 2017 3:03 am

Re: Ordering Polarizability and Polarizing Power

Postby Ashley Odibo Dis3E » Sat Dec 08, 2018 3:19 pm

Then for the anions why isn’t the order Cl-, S-2, P-3, and I -? I understand That I has more shells therefore has more shielding, but since P,S, and Cl are in the same period and have the same number of shells then wouldn’t the ones with a higher number electrons and lower number of protons have more polarizing power?


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