Eplain how vacancies are introdcued in an ionic solid when a cation of higher valances is added as as impurity in it .

Eplain how vacancies are introdcued in an ionic solid when a cation of

1.	Eplain how vacancies are introdcued in an ionic solid when a cation of higher valances is added as as impurity in it .
Answer» Solution :Two or more CATIONS of LOWER valency are replaced by a cation of higher valency to maintain electrical neurality . Hence, some cation vancancies are created. For example , if in the ionic solid, ` Na^(+)CL^(+) `, impurityof ` Sr^(2+)` is added (as ` SrCl_(2)` ) two ` Na^(+)`LATTICE sites will become vacant and one of these will be occupied by ` Sr^(2+)`ion and the other will remain vacant.