Question

Which is the Lewis structure for H3PO4?

Answer 1

There are a total of 32 valence electrons for the H3PO4 Lewis structure. When we have an H (or H2 or H3) in front of a polyatomic molecule (like CO3, SO4, NO2, PO4,etc.) we know that it's an acid. This means that the Hydrogen atoms will be attached to the outside of the oxygen molecules.

Answer 2

The structure of $\bold{H_3PO_4 }$ is, P will be in center and four molecules of oxygen are attached to it with single bonds, the molecules of hydrogen are attached to oxygen.

What is Lewis structure?

A Lewis Structure is a highly simplified representation of a molecule's valence shell electrons.

It's used to depict how electrons in a molecule are distributed around specific atoms.

Electrons are shown as "dots" or as a line between two atoms when they are bonded.

First, we calculate the total valency of $\bold{H_3PO_4 }$

[(3) (1) + (1)(5) + (4)(6)] = 32 e-

It's an oxy acid, in this the hydrogen atoms are attached to oxygen.

P will be the central atom and hydrogen is attached to oxygen.

For stable structure, pis attached to oxygen with double bond.

Thus, this is the structure of $\bold{H_3PO_4 }$.

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