how many moles of impurity vacancies are created if the crystal obtained has10^-3 mole of Sr+2ions
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NaCl is doped with 10
−3
mol % of SrCl
2
.
100 moles of NaCl are doped with 0.001 moles of SrCl
2
.
1 mole of NaCl is doped with
100
0.001
=10
−5
moles of SrCl
2
or 10
5
moles of Sr
2+
cations.
One Sr
2+
ion creates one cation vacancy.
10
−5
moles of Sr
2+
will create 10
−5
moles of cation vacancies which correspond to 10
−5
×6.023×10
23
=6.023×10
18
cation vacancies per mole of NaCl.
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