How many total of CO^3 2- valence electrons?What is lewis structure?What is molecular shape?What is bond angle?Is CO^3 2-polor or non-polar?



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Posted on (Answer #1)

CO3^2- is called a carbonate ion. First we need to count the total number of valence electrons. We just add the valence electrons of each atoms involved.

C = 4

O = 6 x 3

e = 2 ---> we add electrons when the charge of the ion is negative, in

              this case it is negative 2 so we add two electrons.


    24 electrons

Next, we have to assign the central atom; In this case it is C.

Now we have to connect the atoms and form bonds. We can form one C=O and two C-O bonds.


   O = C - O



Finally, we have to distribute the remaining electrons on C atoms provided that it follow the octet rule. 

   ..           ..

   O = C - O  :

   ''      |    ''

       :  O  :


CO3^2- has a geometry of trigonal planar and has a resonance. It has a bond angle of 180 degrees and the molecule is polar.

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