IGNOU CHE 2 2018 - Which metals are called class ‘a’ elements or ‘hard

Question

Which metals are called class ‘a’ elements or ‘hard acids’ and why?

24 Jan 2018

Answer :

Word Count : 299

The concept of hard and soft acids and bases is useflil in characterising the behaviour of class A and class B acceptors. A soft base may be defined as one in which the donor atom is of high polarisability and low electronegativity, is easily oxidised, or is associated with vacant, low-lying orbitais. These terms describe, ii different ways, a base in which the donor atom electrons are not tightly held, but are easily distorted or removed. Hard bases

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