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Polarisability vs Polarizing Power

Posted: Mon Nov 04, 2019 8:14 pm
by Chris Tai 1B
What is the difference between Polarisability and Polarizing Power?

Re: Polarisability vs Polarizing Power

Posted: Mon Nov 04, 2019 8:15 pm
by Heba Mengesha 3D
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.

Re: Polarisability vs Polarizing Power

Posted: Mon Nov 04, 2019 10:04 pm
by 905385366
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.

Re: Polarisability vs Polarizing Power

Posted: Mon Nov 04, 2019 10:43 pm
by Alexa Hernandez 3k
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...

Re: Polarisability vs Polarizing Power

Posted: Thu Nov 07, 2019 10:40 pm
by Junwei Sun 4I
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.

Re: Polarisability vs Polarizing Power

Posted: Fri Nov 08, 2019 9:41 am
by Diana_Diep2I
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.

Re: Polarisability vs Polarizing Power

Posted: Fri Nov 08, 2019 9:53 am
by Angela Patel 2J
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.

Re: Polarisability vs Polarizing Power

Posted: Fri Nov 08, 2019 10:28 am
by Nuoya Jiang
Polarizing power describes the power of a cation to distort an anion, and polarisability is the property of how easy an anion is distorted.

Re: Polarisability vs Polarizing Power

Posted: Fri Nov 08, 2019 11:03 am
by Sartaj Bal 1J
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.

Re: Polarisability vs Polarizing Power

Posted: Fri Nov 08, 2019 11:06 am
by 405335722
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.

Re: Polarisability vs Polarizing Power

Posted: Fri Nov 08, 2019 11:08 am
by anjali41
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.

Re: Polarisability vs Polarizing Power

Posted: Sat Nov 09, 2019 2:31 pm
by Maya Pakulski 1D
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?

Re: Polarisability vs Polarizing Power

Posted: Sat Nov 09, 2019 3:40 pm
by Siya Shah 1J
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.

Re: Polarisability vs Polarizing Power

Posted: Sat Nov 09, 2019 5:37 pm
by Nicholas_Gladkov_2J
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".

Re: Polarisability vs Polarizing Power

Posted: Sun Nov 10, 2019 12:23 am
by Celine 1F
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

Re: Polarisability vs Polarizing Power

Posted: Sun Nov 10, 2019 2:14 pm
by Merin Padayatty 3G
Smaller cations with a larger effective nuclear charge have a higher polarizing power whereas larger anions are have a higher polarizability.