ï»¿ If NaCl is doped with 10â€“3Â mol % of SrCl2'Â what is the concentration of cation vacancies? from Chemistry The Solid State Class 12 Nagaland Board

### Book Store

Currently only available for.
CBSE Gujarat Board Haryana Board

### Previous Year Papers

Download the PDF Question Papers Free for off line practice and view the Solutions online.
Currently only available for.
Class 10 Class 12
If NaCl is doped with 10â€“3Â mol % of SrCl2'Â what is the concentration of cation vacancies?

We know that two Na+Â ions are replaced by each of the Sr2+Â ions while SrCl2Â is doped with NaCl. But in this case, only one lattice point is occupied by each of the Sr2+ ions and produce one cation vacancy.

Here 10Â â€“ 3Â mole of SrCl2Â is doped with 100 moles of NaClÂ Thus, cation vacancies produced by NaCl = 10Â â€“ 3Â molÂ Since, 100 moles of NaCl produces cation vacancies after doping = 10Â â€“3Â mol

Therefore, 1 mole of NaCl will produce cation vacancies after doping

=Â
therefore, total cationic vacancies
=10-5Â  x 6.023 x 1023
=6.023 x 10-18 vacancies
Â

310 Views

Why are solids rigid?

Solids are rigid because the internuclear distance between the  molecules of a solid are very less and closely packed and their positions are fixed due to the strong forces of attraction between them.
2488 Views

Classify the following as amorphous or crystalline solids: Polyurethane, naphthalene, benzoic acid, teflon, potassium nitrate, cellophane, polyvinyl chloride, fibre glass, copper.

Amorphous solids: Polyurethane, teflon, cellophane, polyvinyal chloride, fibre glass.
Crystalline solids: naphthlene, benzoic acid, potassium nitrate, copper.
1237 Views

Refractive index of a solid is observed to have the same value along all directions. Comment on the nature of this solid. Would it show clevage property?

Refractive index of a solid which have the same value along all directions are isotropic in nature. It would not show cleavage property.
1055 Views

Why is glass considred a super-cooled liquid?

Glass is amorphous solids and  have a tendency to flow, though very slowly. Therefore, these are called pseudo solids or super cooled liquids .
1368 Views

Why do solids have a definite volume?

A solid have a definite volume because the inter molecular distance  between its molecules are fixed.
1439 Views