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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

Draw the resonance structures for the formate ion, HCO2, and find the formal charge on each atom. If an H+ ion is attached to HCO2 (to form formic acid), does it attach to C or O?

Interpretation Introduction

Interpretation:

Resonance structures of given formate ion and formal charge of each atom has to be predicted; also either proton is attached to Carbon or Oxygen has to be determined.

Concept Introduction:

Formal charge: It is the electrostatic charge that would reside on an atom in a molecule or polyatomic ion if all bonding electron are shared equally between pairs of atoms.

Formal charge calculation: The formal charge for atom in a molecule or ion is calculated based on the Lewis structure of the molecule or ion by following the given equation below:

Formal charge calculation of molecule or ion =NVE-{LPE+12(BE)

Resonance structures:

A molecule or ion which show more than structure but none of them are accurately correct show the known property of that molecule, and can lie between the canonical structure is known as resonance or canonical or contributing structure.

Explanation

HCO2-, Three resonance structures are possible. These structures are drawn below.

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