Question

What type of defect is produced when nacl is doped with srcl2 and why?

Answer 1

Cation vacancy (metal deficiency) type defect is produced when is doped with SrCl2 .

What type of defect is introduced when molten NaCl is crystallized with SrCl2?

• Defects that lead to substitution of a cation by another as well as a vacant lattice site are known as impurity defects.
• They arise when a molten ionic salt like NaCl is crystallized in presence of another salt like SrCl2.
• At a few sites in the crystal lattice, Sr2+ cation substitutes for Na.

What type of crystal defect is produced when NaCl is doped with MgCl2 or SrCl2?

• Impurity defect is produced when NaCl is doped with MgCl2.

What happens when SrCl2 is added to NaCl?

• When NaCl crystal is doped with SrCl2 , it forms solid solution.
• In this type of solid , some of the Na+ is replaced by Sr2+ hence create the cationic vacancies equal to number of Sr2+ ions occupy the interstitial sites.
• In this way properties of solid has been changed.

What happens when NaCl containing a little of SrCl2 is Crystallised?

• When molten NaCl (Na+ is monovalent) containing a little amount of SrCl2 (Sr2+ is divalent) as impurity is crystallised, some of the sites of Na+ ions are occupied by Sr2+.
• Each Sr2+ replaces two Na+ ions.

Hence, Cation vacancy (metal deficiency) type defect is produced when is doped with SrCl2 .

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