Packing Efficiency

Let, the number of

M%20%5E%7B2%2B%7D

ions

%3D%20x

Then, the number of

M%20%5E%7B3%2B%7D

ions will be

0.96-%20x

We know, the overall charge in the metal oxide is zero. So,

x(2)%2B(0.96-x)(3)%2B1(-2)%3D0

%5CRightarrow%202%20x%2B2.88-3%20x%3D2

%5CRightarrow-%20x%20%3D-0.88

%5CRightarrow%20x%20%3D0.88

%5Ctherefore

Number of

M%20%5E%7B3%2B%7D

ions

%3D0.96-0.88%3D0.08

%5Ctherefore

Percentage of

M%20%5E%7B3%2B%7D

ions

%3D0.08%20%2F%200.96%20%5Ctimes%20100%3D8.33%20%5C%25

Chapter Questions
1 MCQs