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Explain how vacancies are introduced in …

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

Posted by Manish Jee 3 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Sia ? 3 years, 5 months ago

Two or more cations of lower valency are replaced by a cation of higher valency to maintain electrical neutrality. Hence some cation vacancies are created. For example : In an ionic solid 'NaCl' , is impurity of Sr²⁺ is added (as SrCl²) then two Na⁺ ions left thus lattice sited. To maintain electrical neutrality one lattice site is occupied by Sr²⁺ ion while other lattice site will remain vacant.

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