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3. If the radius of Mg2+, Cs+, O2-,S2- and Cl- ion are 0.65 A0, 1.69 A0, 1.40 A0, 1.84 A0 and 1.81 A0 respectively. Find the coordination number of MgO,MgS and CsCl.
Asked by surbhipandit10134 | 07 Jun, 2018, 01:41: PM
answered-by-expert Expert Answer
I f space t h e space r a d i u s space o f space M g 2 plus comma space C s plus comma space O 2 minus comma S 2 minus space a n d space C l minus space i o n space a r e space 0.65 space A 0 comma space 1.69 space A 0 comma space 1.40 space A 0 comma space 1.84 space A 0 space a n d space 1.81 space A 0 space r e s p e c t i v e l y. space F i n d space t h e space c o o r d i n a t i o n space n u m b e r space o f space M g O comma M g S space a n d space C s C l. B e f o r e space c a l c u l a t i n g space t h e space c o o r d i n a t i o n space n o. space l e t s space f i n d space o u t space t h e space r a d i u s space r a t i o comma R a d i u s space r a t i o space f o r space M g O space equals space fraction numerator R a d i u s space o f space M g to the power of plus over denominator R a d i u s space o f space O to the power of 2 minus end exponent end fraction space equals space fraction numerator space 0.65 over denominator 1.40 end fraction space equals 0.464 space F r o m space t h e space b e l o w space r a d i u s space c h a r t space w e w i l l space f i n d space o u t space t h e space c o o r d i n a t i o n space n u m b e r colon
Radius ratio Coordination number
0.155-0.225            3
0.225-0.414            4
0.414-0.732            6
0.732-1            8
 
 
T h e space r a d i u s space r a t i o space o f space M g O space i s space f a l l s space b e t w e e n space 0.414 minus 0.732 comma space h e n c e space t h e space c o o r d i n a t i o n space n u m b e r space w i l l space b e space 6
 
Similarly you can find other molecules.
Answered by Ramandeep | 08 Jun, 2018, 03:36: PM

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