First we need to count the total number of valence electrons. Total valence electrons = 4 in double bond + 4 in two single bonds + 4 in oxygen w/ d.b. Predict the molecular shape of the carbonate ion O linear O tetrahedral O bent O trigonal pyramidal O tetrahedral O linear trigonal pyramidal trigonal planar (1209) O bent trigonal planar (1209) … The other observation is that all the three bond lengths are equal. Carbonate has 24 electrons, 2 of them responsible for the -2 charge, probably electrons from calcium, sodium or whatever salt resulted in a cation that donated electrons to the carbonate anion. CO3^2- is called a carbonate ion. Unlike O 3, though, the actual structure of CO 3 2− is an average of three resonance structures. You will learn about these things in this tutorial. O: 6 - 1 - 6 = -1. The Lewis structures of methane, the carbonate ion, carbon dioxide, and the sulfite ion are given Methane, CH Carbonate ion, CO Carbon dioxide, CO, Sulfite ion, O: Predict the molecular shape of methane. --> +1 Charge on Carbon is unstable, change structure. Total valence electrons concept is used to draw the lewis structure of C 2 O 4 2-. The calculated values of bond distances between carbon and oxygen in C = 0 and C-0 are 1.22 Å and 1.43 Å respectively but the observed bond length is neither 1.22 nor 1.43 Å but some what between these two values. We just add the valence electrons of each atoms involved. The carbon atom in pure structure still needs to share electrons to satisfy the octet rule. CO3 2- is carbonate.a carbonate is a salt of carbonic acid (H2CO3),characterized by the presence of the carbonate ion, a polyatomic ion with the formula of CO3 2-. + 12 in other two O = 12+12 = 24 Because carbon is the least electronegative element, we place it in the central position: Lewis structure of oxalate ion is drawn in this tutorial step by step. Our first attempt at drawing the lewis dot structure of the carbonate ion results in the structure shown below. Carbonate ion can be represented by the following Lewis structure. After finishing the lewis structure of C 2 O 4 2-, there should be a -2 charge and a stability. Total charge = -2. 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 One double bond to one O, and two single bonds to the other 2 Oxygens: Charges: C: 4 - 4 - 0 = 0. The Carbonate (\(CO_3^{2−} \)) Ion. 1. Which atom is … Like ozone, the electronic structure of the carbonate ion cannot be described by a single Lewis electron structure.