Saved Bookmarks
| 1. |
Write the formal charges on atoms in (i) and carbonate ion (ii) nitrite ion. |
Answer» Solution : (i) Lewis structure of ` CO_(3)""^(2-)` ions is  Formal charge on C atom ` = 4 - 0 - (1)/(2) (8) = 0 ` , formal charge on double BONDED O atom = ` 6 - 4 - (1)/(2) (4) = 0 ` Formal charge on single bonded O atom ` = 6 - 6 - (1)/(2) (2) = - ` (ii) Lewis structure of ` NO_(2)^(-)`ions is  Formal charge on N atom = ` 5 - 2 - (1)/(2) (6) = 0 ` , Formal charge on double bonded O atom ` = 6 - 4 - (1)/(2) (4) = 0 ` Formal charge on single bonded O atom `= 6 - 6 - (1)/(2)= - 1 ` Singnificance of formalcharge . The MAIN advantage of the calculation of formal charges is that it helps to select the most stable structure, i.e., the one with least energy out of the different POSSIBILE Lewis structure. The most stable is the one which has the SMALLEST formal charges on the atoms. |
|