Question

why cynide ion is a soft base​

Answer 1

Answer:All nucleophiles are Lewis bases. This is because a Lewis base is a substance that is able donate a pair of electrons. Since nucleophiles are electron donors, they are Lewis bases. This would mean, a cyanide ion can act as a base hence 'cyanide is a weak base'

n Pearson's HSAB theory, large and diffuse orbitals — often also called polarisable — are associated with soft acids or bases, as the charge per volume value is considered comparatively low. Therefore, just by looking at the size of this orbital, we can identify it as a 'soft' one

Explanation: