The oxidation and the reduction reactions

The oxidation and the reduction processes take place by two ways , Losing and gaining oxygen or hydrogen , Losing and gaining the electrons , The two processes of oxidation and reduction are concurrent processes as they occur at the same time .

Oxidation & reduction by losing and gaining oxygen or hydrogen

H2 + CuO right facing arrow with heat Cu + H2O

What happens during the reaction of hydrogen gas passes and hot copper oxide ?

It is very important to know that Hydrogen is oxidized because it combines with oxygen , Hydrogen is considered as a reducing agent because it took oxygen from copper oxide , Copper oxide is reduced because it loses oxygen , Copper oxide is considered as an oxidizing agent because it gaves oxygen to hydrogen .

You have to know that the oxidation is the chemical process that causes the increase in the oxygen percentage or the decrease in the hydrogen percentage in the substance , The reduction is the chemical process that causes the decrease in the oxygen percentage or the increase in the hydrogen percentage in the substance .

It is very important to know that the oxidation agent is the substance which gives oxygen or takes hydrogen away during a chemical reaction , The reducing agent is the substance which takes oxygen away or gives hydrogen during a chemical reaction .

The oxidation and the reduction by losing and gaining the electrons

Oxidation and reduction

Oxidation and reduction

The reaction of sodium with chlorine to produce sodium chloride ( the table salt ) shows the oxidation and the reduction reaction ( It does not include oxygen or hydrogen ) , Sodium metal and chlorine gas react sharply to form sodium chloride , The oxidation and the reduction happen together in this reaction .

 2 Na +Cl2 → 2NaCl

Sodium atom is monovalent because it loses one electron and changes into the positive ( + ve ) ion , This process is known as the oxidation process , Sodium atom is oxidized because it loses an electron and changes into (+ ve ) ion , Sodium atom is considered as a reducing agent because it loses ( gives ) an electron .

Na → Na + + e −    

2 Na → 2 Na + + 2 e

Chlorine atom is monovalent because it gains an electron ( which is lost from sodium atom ) and changes into a negative ( – ve ) ion , This process is known as the reduction process , Chlorine atom is reduced because it gains an electron and changes into ( -ve ) ion , Chlorine atom is considered as an oxidizing agent because it gains an electron .

Cl 2 + e → Cl

Cl 2 + 2 e → 2 Cl

You have to know that the ions can not remain free , therefore the negayive ( Cl  ) ion combines with the positive ( Na + ) ion to form a sodium chloride molecule ( NaCl ) .

It is very important to know that the oxidation is a chemical process where the atom loses an electron or more , The reduction is a chemical process where the atom gains an electron or more during a chemical reaction .

The oxidizing agent ( factor ) is the substance which gains an electron or more during a chemical reaction , The reduction agent ( factor ) is the substance which loses an electron or more during a chemical reaction .

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