Chemical Bonding And Molecular Structure Question 423
Question: In $ PO{{_4^{3}}^{-}} $ , the formal charge on each oxygen atom and the $ P-O $ bond order respectively are
Options:
A) $ -0.75,0.6 $
B) $ -0.75,1.0 $
C) $ -0.75,1.25. $
D) $ -3,1.25 $
Show Answer
Answer:
Correct Answer: C
Solution:
- $ {{[ O-\overset{O}{\mathop{\overset{||}{\mathop{\overset{|}{\mathop{\underset{O}{\mathop{\underset{|}{\mathop{P}},}},}},}},}},-O ]}^{3-}}\rightarrow {{[ O=\overset{O}{\mathop{\overset{|}{\mathop{\underset{O}{\mathop{\underset{|}{\mathop{P}},}},}},}},-O ]}^{3-}} $
Bond order $ =\frac{Numberofbonds}{NumberofResonatingstructures} $ $ =\frac{5}{4}=1.25 $
Three unit negative charge is being shared by four 0 atoms. Formal charge $ =-3/4 $ $ =-0.75 $
