Question #76f5c

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Question #76f5c

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Answer 1 · 2016-11-10T18:23:44

First, it is a concept of VSEPR (Valence Shell Electron Pair Repulsion Theory) .

Explanation:

Hydronium ion is ${[H_{3} O]}_{3}^{+}$ $color(red)([H_3O]^+)$ .
So, here the central atom is Oxygen $(O)$ $(O)$ .

Since, there is $+ v e$ $+ve$ charge on the entire ion, so it is better to consider the $+ v e$ $+ve$ charge to be on $O$ $O$ atom.

Now, $O^{+}$ $color(red)(O^+)$ has $5$ $5$ valence electrons. Out of 5 electrons, 3 will be shared by the three $H$ $H$ atoms and other two electrons form one lone pair.

So, In total, there are $3$ $color(blue)(3)$ bond pairs and $1$ $color(blue)(1)$ lone pair on $O$ $O$ atom.

So, it's distribution is TETRAHEDRAL , and the shape is Trigonal PYRAMIDAL in order to allow least possible repulsions.

So, lewis structure and shape of Hydronium ion is :
Brooks
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