Why pseudo inert configuration has more Polarising power?
Table of Contents
- 1 Why pseudo inert configuration has more Polarising power?
- 2 What is the relationship between polarizing power and size of cation?
- 3 What is polarizing power of a cation in ionic compounds?
- 4 Which has maximum Polarising power in cation?
- 5 What is Fajan’s rule how the size of cation affects the polarization in ionic bonds?
- 6 What is the relation between polarization and charge cation anion?
- 7 Which cation has more polarizing power?
- 8 What are the factors affecting the magnitude of Polarising power of cation and polarisability of anion?
- 9 What is the Zeff of a pseudo inert cation?
- 10 How does the polarising power of a cation depend on its nucleus?
- 11 What is the effect of noble gas configuration on anion distortion?
Why pseudo inert configuration has more Polarising power?
Why? The reason is very simple. Increased nuclear charge & poor shielding of one d electron by another d electron help to polarise the electron cloud of other anion easily, so polarising power of cation having pseudo configuration is more.
What is the relationship between polarizing power and size of cation?
Complete step-by-step answer: The polarizing power of a cation is inversely proportional to its size. Smaller is the size of the cation and higher will be its charge density, which means greater concentration of charge on a smaller area. The more will be the charge density, higher will be its polarising power.
Why pseudo noble gas configuration is more covalent?
If two cations have the same size and charge, then the one with pseudo noble gas configuration ( with 18 electrons in the outermost shell) has greater polarising power than the other with noble gas configuration (with 8 electrons in the outermost shell). This explains why CuCl is more covalent than NaCl.
What is polarizing power of a cation in ionic compounds?
When the degree of polarization is very small, an ionic bond is formed, whereas a covalent bond occurs if the degree of polarization is high. A cation’s ability to distort an anion is described as its polarization power, and its polarizability is defined as the anion’s tendency to become polarized by the cation.
Which has maximum Polarising power in cation?
Al
The polarising power of a cation increases as the cation’s size decreases, while anions’ polarisability decreases as the cation’s size increases. Hence, Al has the highest polarising power.
What is pseudo inert gas configuration?
Pseudo – inert gas configuration means having 18 electron instead of 8 electrons in (n−1) shell electronic configuration after gaining or loosing electron. The ions of certain elements are stable as they have a complete valence shell but do not have the configuration of a noble gas .
What is Fajan’s rule how the size of cation affects the polarization in ionic bonds?
The polarizing power of the ion will be high since the charge density is high, this makes the compound to be more covalent. Rule 2: The second rule tells us about the polarizability of the anion….Fajans’ Rule.
| Ionic | Covalent |
|---|---|
| Low positive charge | High positive charge |
| Large cation | Small cation |
| Small anion | Large anion |
What is the relation between polarization and charge cation anion?
The ability of a cation to distort an anion is known as its polarization power and the tendency of the anion to become polarized by the cation is known as its polarizability….Fajans’ Rules.
| Covalent | Ionic |
|---|---|
| Large anion | Small anion |
| High charges | Low charges |
What is meant by pseudo inert gas configuration?
Which cation has more polarizing power?
The polarising power of a cation increases as the cation’s size decreases, while anions’ polarisability decreases as the cation’s size increases. Hence, Al has the highest polarising power.
What are the factors affecting the magnitude of Polarising power of cation and polarisability of anion?
It is directly proportional to the charge density, which in turn is directly related to the charge on cation, while inversely related to the size of anion. The polarizing power increases with increase in the size of cation i.e. smaller cations are very effective in the polarization of anion.
Which of the following ions will cause highest polarization?
(Ni4+) has highest charge which increases the polarising power of the cation and thus increases the polarisation of Br− ion.
What is the Zeff of a pseudo inert cation?
When a cation has a pseudo inert configuration ( i.e. the case with transition elements), we get d-orbitals filled with 10 e-. As d-orbitals have poor shielding, the Zeff increases, increasing the polarising power of that cation manifolds!!
How does the polarising power of a cation depend on its nucleus?
Polarising power of a cation increases when its nucleus has strong attractive power towards the nearby anion. And for pseudo noble gas configuration ,acc to slaters rule ,Z eff increses highly for which it gains high polarising power. Thank you.
What is the electron configuration of pseudo noble gas?
An element with pseudo noble gas configuration has 18 electrons in the highest energy level instead of 8. For example, silver has e- configuration of [Ar] 5s1 4d10.
What is the effect of noble gas configuration on anion distortion?
The cations with psuedo noble gas configuration produce more distortion in the anion due to decrease in the shielding effect (which happens due to the accomodation of 18,18… electrons in a single shell only).Thereby increasing the polarising power and coavalent character.