Question

define impurity defect in chemistry​

Answer 1

impurity defect:--

if molten NaCl containing a little amount of SrCl2 is crystallized some of the sites of Na+ions are occupied by Sr2. each Sr2+ replaces two Na+ ions. it occupies the site of one ion and the other site remains vacant. the cationic vacancies thus produced are equal in number to that of Sr2+ ions. another similar example is the solid solution of CdCl2 and AgCl.

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Answer 2

Answer:

The distortion of crystal lattice when an impurity (foreign atom/ ion) occupies an interstitial site in the lattice or replace the parent atom/ ion in the lattice is called impurity defect.