School Binder

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2026/04/11　Sat 　　△

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author : C. William　×

Oxidation -reduction (Redox)

" LEO the lion says GER "

Loss of Elections = Oxidation
Gain of Elections = Reduction

- Fe⁰ + S⁰ → Fe²⁺S^2-

- Fe⁰ = 26pt, 26e^-
- S⁰ = 16pt, 16e^-

pt = protons
e^- = electrons

* Fe is the reducing agent.
* S is the oxidizing agent.

Na⁺Cl^- + Ag⁺NO₃^- → Na⁺Na₃^- + Ag⁺Cl^-
There is nothing being oxidited, nothing being reduiced. NOT oxidation-reaction.

Oxidation Numbers

- The number of electrons that an atom lost or gained (or assumed) when it undergoes reaction.

H⁺⁺Cl⁷⁺O₄^{2-, 8-}
H⁺Cl⁵⁺O₄^{2-, 6-}
H⁺Cl³⁺O₂^{4-, 2-}
H⁺Cl⁺O^2-
H⁺Cl^-

Cl ±1, 3, 5, 7

* Hydrogen is a¹⁺ except when it is paired up with something with a higher electronegativity.

Na¹⁺H

Ba²⁺O^2-
H₂²⁺O₂^2-
O²⁺F₂^2-

# p⁺ = # e^- → No change.

NH^3-H₃^{3+, +}
N₂^2-H₄⁺
N^1-H₂^{2+, +}O^2-H⁺

N₂⁰
N₂¹⁺O^2-
N²⁺O^2-

N₂³⁺O₃^{6-, 2-}
N⁴⁺O₂^2-
N₂⁵⁺O₅^{10-, 2-}

Balance the number of Electrons on each side of equition. -This is called Net ionic equition.
You may able to know the charge from given chart or periodec table.

author : C. William　×

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