There room a complete of 18 valence electron in the HCO2- Lewis structure.HCO2- is likewise called Formate Ion. Carbon (C) is the least electronegative atom and also goes at the center of the HCO2- Lewis structure.With HCO2- you"ll need to kind a dual bond in between one the the Oxygen atoms and the Carbon atom to fill the octets and also still use only the 18 valence electrons obtainable for the molecule.Remember to placed brackets approximately the HCO2- Lewis dot framework with a an unfavorable one sign external the base to present the structure is one ion.

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Transcript: for the HCO2- Lewis structure, we have a total of 18 valence electrons. Hydrogens always go ~ above the outside of Lewis structures. Carbon is less electronegative than Oxygen, so we"ll placed a Carbon in the center, and also then we"ll put the Oxygens ~ above the Carbon. We have actually a total of 18 valence electrons for the HCO2- Lewis structure. We"ll put two between atoms to kind chemical bonds, and also we"ll go about the outside. Therefore we"ve supplied 2, 4, 6, 8, and also 18.

So in ~ this point, we"ve offered all 18 valence electrons. The Oxygens have eight valence electrons, so their octets room full, and also the Hydrogen has actually two valence electrons, therefore it has actually a complete outer shell, together well. However, the Carbon only has six, for this reason we"re walking to need to share some electrons to gain Carbon to have an octet. Let"s take it these 2 valence electrons and also move them to the facility to form a twin bond. So we"re still making use of 18 valence electrons. The Oxygen, it still has actually eight valence electrons; but now the Carbon, it has actually eight valence electrons. So we"ve offered all 18 valence electrons, and also each the the atoms has actually its outer shell full.

If we examine the formal charges, we"ll see that all the atoms have actually a formal fee of zero other than this Oxygen best here. It has actually a formal charge of an adverse one. That renders sense, though, due to the fact that we have actually a an unfavorable one up here so it requirements to enhance our Lewis structure for HCO2-. One last thing: since we do have actually an ion, we need to put brackets around the structure and put a an adverse sign ~ above the exterior to present that the is one ion.

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So that"s the Lewis structure for HCO2-. This is Dr. B., and also thanks for watching.

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Frequently tested Lewis StructuresBasicCH4, NH3, C2H4, O2, N2IntermediateO3, BBr3, I3-, BrF5, NOAdvancedSO3, H2SO4, OCN-, XeO3, ClO4-