We will have to draw the Lewis Structure of HCO2- first.
Step 1: Determine the central atom in this molecule.
• C and H are less electronegative than O but H can only make one bond
• C is the central atom and is bonded to the other C atom
Step 2: Calculate the total number of valence electrons present.
HCO2-:
Group Valence Electrons
C 4A 4 valence e‑ x 1
H 1A 1 valence e‑ x 1
O 6A 6 valence e- x 2
= 17 valence e‑
-1 charge +1 e-
Total = 18 valence e-
Step 3: Draw the Lewis Structure for the molecule
• O and C → prefers to have complete octet (8 e- around them)
How many resonance structures exist for the formate ion, HCO2−?
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Resonance Structures concept. You can view video lessons to learn Resonance Structures. Or if you need more Resonance Structures practice, you can also practice Resonance Structures practice problems.
What professor is this problem relevant for?
Based on our data, we think this problem is relevant for Professor Wang's class at SJU.