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  • In PO43- the formal charge on each O- atom and P-O bond order respectively are :Option: 1 -0.75,1.0<div clas

In PO43- the formal charge on each O- atom and P-O bond order respectively are :

Option: 1

-0.75,1.0


Option: 2

-0.75,1.25


Option: 3

-0.75,0.6


Option: 4

-3, 1.25


Answers (1)

best_answer

Formal charge -

Formal charge is difference between the number of valence electron in an isolated atom and number of electrons assigned to that atoms in lewis structure.  

Formal Charge = 

\mathrm{\left [ Total \:number\:of\:valence\:electron\:in\:the\:free\:atom\:-\frac{1}{2}(Total\:number\:of\:shared\:electron\:i.e.\:bonding\:electrons) \right ]}

 

 

Formula charge on each O-atom 

\mathrm{\frac{Total \ charge}{No.\: of\ O-atoms}=\frac{-3}{4}=-0.75}

 

P-O bond order 

=\frac{\textrm{Total no of bond}}{\textup{no. of resonating structure}}=\frac{5}{4}=1.25

Hence, option number (2) is correct.

Posted by

Gaurav

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