Déduisez de la structure de Lewis des espèces suivantes les...

Déduisez de la structure de Lewis des espèces suivantes les degrés d'oxydation des éléments qui les constituent: a) $\mathrm{AlH}_3$ c) $\mathrm{CH}_2 \mathrm{Cl}_2$ e) $\mathrm{H}_3 \mathrm{~S}^{+}$ g) $\mathrm{HCN}$ i) $\mathrm{ClO}_2^{-}$k) $\mathrm{N}_2$ m) $\mathrm{F}_2 \mathrm{O}$ b) $\mathrm{ClNO}$ d) $\mathrm{PCl}_4{ }^{+}$ f) $\mathrm{NH}_4 \mathrm{NO}_3$ h) $\mathrm{BF}_4^{-}$ j) $\mathrm{SOF}_4$ 1) $\mathrm{KClO}_4$ n) $\mathrm{Na}_2 \mathrm{O}_2$

Déduisez de la structure de Lewis des espèces suivantes les degrés d'oxydation des éléments qui les constituent:
a) $\mathrm{AlH}_3$
c) $\mathrm{CH}_2 \mathrm{Cl}_2$
e) $\mathrm{H}_3 \mathrm{~S}^{+}$
g) $\mathrm{HCN}$
i) $\mathrm{ClO}_2^{-}$k) $\mathrm{N}_2$
m) $\mathrm{F}_2 \mathrm{O}$
b) $\mathrm{ClNO}$
d) $\mathrm{PCl}_4{ }^{+}$
f) $\mathrm{NH}_4 \mathrm{NO}_3$
h) $\mathrm{BF}_4^{-}$
j) $\mathrm{SOF}_4$
1) $\mathrm{KClO}_4$
n) $\mathrm{Na}_2 \mathrm{O}_2$

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

Charge Balance and Formal Charge

Formal charge, while distinct from oxidation state, helps explain how electron distribution in a Lewis structure leads to the overall charge of a molecule or ion. Ensuring that the sum of all oxidation states (or formal charges in a Lewis structure) equals the total charge of the compound is key to correctly determining oxidation numbers.

Electronegativity

Electronegativity is a measure of an atom's ability to attract and hold onto electrons. In the context of oxidation states, the more electronegative atom in a bond is assigned the electrons, which is crucial in calculating the formal oxidation state of each atom in the molecule.

Oxidation State Determination

Oxidation states are formal charges assigned to atoms in a compound based on the assumption that electrons in bonds are completely transferred to the more electronegative atom. The sum of the oxidation states of all atoms in a neutral molecule is zero, while in an ion it equals the net charge, which helps in systematically determining the oxidation numbers.

Lewis Structures

Lewis structures are diagrams that represent the bonding between atoms and the lone pairs of electrons in a molecule. They provide a visual means to determine how electrons are distributed among atoms and how bonds are formed, which is critical for assessing oxidation states.

Transcript

Please give Ace some feedback