Polarisability vs Polarizing Power

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Chris Tai 1B
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Polarisability vs Polarizing Power

Postby Chris Tai 1B » Mon Nov 04, 2019 8:14 pm

What is the difference between Polarisability and Polarizing Power?

Heba Mengesha 3D
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Re: Polarisability vs Polarizing Power

Postby Heba Mengesha 3D » Mon Nov 04, 2019 8:15 pm

Smaller, more positive cations would pull electrons more strongly, so they have more polarizing power. On the other hand, polarizability is the ability to pull those electrons towards the anion.

905385366
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Re: Polarisability vs Polarizing Power

Postby 905385366 » Mon Nov 04, 2019 10:04 pm

Polarizability power refers to an atom's ability to cause large distortions in the electron cloud while polarizability is an atom's likeliness to undergo a large distortion.

Alexa Hernandez 3k
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Re: Polarisability vs Polarizing Power

Postby Alexa Hernandez 3k » Mon Nov 04, 2019 10:43 pm

Polarisability is an atoms ability to be polarised, this can be determined by the atom's radius. A larger atomic radius means that the atoms electrons can be more easily distorted making them easier to polarize (Consecuently they are very Polarisable).
Polarazing Power is an atoms ability to polarize another atom. Smaller atomic radius= more Polarizing Power...

Junwei Sun 4I
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Re: Polarisability vs Polarizing Power

Postby Junwei Sun 4I » Thu Nov 07, 2019 10:40 pm

Polarizing power normally indicates the ability of the cation to attract the valence electrons of an anion, which is the ability of an atom to cause electron cloud distortion. Whereas polarizability means the atom's ability/tendency to be polarized, in order words the atom's ability to form dipoles. For example bigger anions have more polarizable electrons and therefore are more likely to form dipoles.

Diana_Diep2I
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Re: Polarisability vs Polarizing Power

Postby Diana_Diep2I » Fri Nov 08, 2019 9:41 am

To add to the replies above, a large anion is usually polarizable because the outer electrons are further from the nucleus and are more likely to feel less of an effective nuclear charge. Meanwhile, a small cation has more polarizing power because of its stronger nuclear charge.

Angela Patel 2J
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Re: Polarisability vs Polarizing Power

Postby Angela Patel 2J » Fri Nov 08, 2019 9:53 am

Small and highly charged cations are said to have very high polarizing power, because they will attract negative charge. For example, the Al3+ ion has very high polarizing power.

Nuoya Jiang
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Re: Polarisability vs Polarizing Power

Postby Nuoya Jiang » Fri Nov 08, 2019 10:28 am

Polarizing power describes the power of a cation to distort an anion, and polarisability is the property of how easy an anion is distorted.

Sartaj Bal 1J
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Re: Polarisability vs Polarizing Power

Postby Sartaj Bal 1J » Fri Nov 08, 2019 11:03 am

An easy way to remember the pattern of polarizing power and polarizability is that cations need to be smaller and have a greater magnitude positive charge to have a higher polarizing power while anions need to be larger and have a smaller magnitude negative charge to have a higher polarizability. The trends are effectively the opposite.

405335722
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Re: Polarisability vs Polarizing Power

Postby 405335722 » Fri Nov 08, 2019 11:06 am

Also, a trend that goes with it.

Atoms that are larger (and therefore have more electrons) are more Polarizable.

Atoms that are smaller (and have fewer electrons) have more Polarizing Power.

anjali41
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Re: Polarisability vs Polarizing Power

Postby anjali41 » Fri Nov 08, 2019 11:08 am

According to the textbook, polarizing power is the ability of an ion to polarize a neighboring atom or ion. On the other hand, polarizability is a measure of the ease with which the electron cloud of a molecule can be distorted.

Maya Pakulski 1D
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Re: Polarisability vs Polarizing Power

Postby Maya Pakulski 1D » Sat Nov 09, 2019 2:31 pm

Is there a trend on the periodic table that tells polarisability and polarizing power or we just have to know based on the size of the cation?

Siya Shah 1J
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Re: Polarisability vs Polarizing Power

Postby Siya Shah 1J » Sat Nov 09, 2019 3:40 pm

Polarizability is for atoms that tend to form anions and have larger electron clouds and it measures how much those electron clouds can be distorted. Polarizing power is for the cations that have the nuclear power to distort electron clouds of other atoms.

Nicholas_Gladkov_2J
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Re: Polarisability vs Polarizing Power

Postby Nicholas_Gladkov_2J » Sat Nov 09, 2019 5:37 pm

Chris Tai 1L wrote:What is the difference between Polarisability and Polarizing Power?


Polarizabilty are anions that are large. You can think of it as the ability to be polarized, so the larger it is the more ability to be affected but the cation.
Polarizing power is the small cation that causes the atom that has a large polarizability to be "deformed".

Celine 1F
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Re: Polarisability vs Polarizing Power

Postby Celine 1F » Sun Nov 10, 2019 12:23 am

smaller cations have high polarizing power while big anions have high polarizability. Polarizability measures how easily an electron cloud can be distorted while polarizing power measures the ability of an ion to polarize another ion

Merin Padayatty 3G
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Re: Polarisability vs Polarizing Power

Postby Merin Padayatty 3G » Sun Nov 10, 2019 2:14 pm

Smaller cations with a larger effective nuclear charge have a higher polarizing power whereas larger anions are have a higher polarizability.


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