|Class 12 Chemistry The Solid State||Doping|
Fig. Doping electron rich impurity into an intrinsic conductor
Number of cation vacancies in lattice of NaCl = Number of divalent Sr2+ ions added.
Concentration of cation vacancy on doping with 10-3 mol% of SrCl2. = 10-3 mol% = 10-3 / 100 = 10-5 mol.
Number of Sr2+ ion in 10-5 mol = 10-5 x 6.023 x 1023 = 6.023 x 1018
Hence number of cationic vacancies = 6.023 x 1018