Question

acidic reaction / oxidation

Answer 1

what it means and how it relates to reduction:

Oxidation Definition

Oxidation is the loss of electrons during a reaction by a molecule, atomor ion.

Oxidation occurs when the oxidation state of a molecule, atom or ion is increased. The opposite process is called reduction, which occurs when there is a gain of electrons or the oxidation state of an atom, molecule, or ion decreases.

An example of a reaction is that between hydrogen and fluorine gas to form hydrofluoric acid:

H2 + F2 → 2 HF

In this reaction, hydrogen is being oxidized and fluorine is being reduced. The reaction may be better understood if it is written in terms of two half-reactions.

H2 → 2 H+ + 2 e-

F2 + 2 e- → 2 F-

Note there is no oxygen anywhere in this reaction!

Historical Definition of Oxidation Involving Oxygen

An older meaning of oxidation was when oxygen was added to a compound. This was because oxygen gas (O2) was the first known oxidizing agent. While the addition of oxygen to a compound typically meets the criteria of electron loss and an increase in the oxidation state, the definition of oxidation was expanded to include other types of chemical reactions.

A classic example of the old definition of oxidation is when iron combines with oxygen to form iron oxide or rust. The iron is said to have oxidized into rust.

The chemical reaction is:

2 Fe + O2 → Fe2O3

The iron metal is oxidized to form the iron oxide known as rust.

Electrochemical reactions are great examples of oxidation reactions. When a copper wire is placed into a solution that contains silver ions, electrons are transferred from the copper metal to the silver ions.

The copper metal is oxidized. Silver metal whiskers grow onto the copper wire, while copper ions are released into the solution.

Cu(s) + 2 Ag+(aq) → Cu2+(aq) + 2 Ag(s)

Another example of oxidation where an element combines with oxygen is the reaction between magnesium metal and oxygen to form magnesium oxide. Many metals oxidize, so it's useful to recognize the form of the equation:

2 Mg (s) + O2 (g) → 2 MgO (s)

Answer 2

oxidation :- addition of oxygen and removal of hydrogen is known as oxidation reaction ....