Question

what is meant by polarisation of ions? write factors which affect the polarising power of ions.
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Answer 1

Answer:

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Explanation:

Polarization power

If the degree of polarization is quite small, an ionic bond is formed, while if the degree of polarization is large, a covalent bond results. The ability of a cationto distort an anion is known as its polarization powerand the tendency of the anion to become polarizedby the cation is known as its polarizability.

factors affecting Polarization Power

Small cation:

Large anion:

Large charges:

Electronic configuration of the cation:

Percentage of ionic character and charge distribution

Bond character based on electronegativity differences

London dispersion forces

Anomalous behaviour of the 2nd row elements: Li, Be, B, C, N, O, F

Reactivity of metals and metalloids

Covalent character

Catenation

Multiple Bonds

Oxidizing ability of oxygen and fluorine

Answer 2

Answer:

Polarisation of ions , in a lay men language can be defines as the ability of a cation /anion to become polarised;where polarised means a bond formes b/w two polar atoms.

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.