Explain how vacancies are introduced in an ionic solid when a cation of higher valence is aded as an impurity in it ?

Explain how vacancies are introduced in an ionic solid when a cation o

1.	Explain how vacancies are introduced in an ionic solid when a cation of higher valence is aded as an impurity in it ?
Answer» When a cation of higher vacancies is added as an impurity to an ionic solid , some vacancies are created . This can be explained with the help of an example . When strontium , chloride `(SrCl_(2))` is added as an impurity to ionic solid sodium chloride (NaCl) , two vacant sites are created by removal of one `Na^(+)` ion . One vacant site is replaced by `Sr^(2+)` ion but the other remains vacant . The reason is that the crystal as a whole is to remain electrically neutral.

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Explain how vacancies are introduced in an ionic solid when a cation of higher valence is aded as an impurity in it ?

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