what is oxidation and reduction
and redox reaction? GIVE examples too
Answers
Answer:
The answer is:
Explanation:
Redox reaction:
A redox (or oxidation-reduction) reaction is a type of chemical reaction that involves a transfer of electrons between two species. What is a "species"? We can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products.
Example- Reaction Between Hydrogen and Fluorine
In the reaction between hydrogen and fluorine, the hydrogen is oxidized whereas the fluorine is reduced. The reaction can be written as follows. The hydrogen and fluorine ions go on to combine in order to form hydrogen fluoride.
Oxidation reaction:
Oxidation is loss of electrons (OIL RIG). That means that an oxidising agent takes electrons from that other substance. So an oxidising agent must gain electrons.
Example-The reaction between magnesium metal and oxygen to form magnesium oxide involves the oxidation of magnesium.
Reduction reaction:
Reduction is a chemical reaction that involves the gaining of electrons by one of the atoms involved in the reaction between two chemicals. The term refers to the element that accepts electrons, as the oxidation state of the element that gains electrons is lowered. ... The iron is oxidized and the oxygen is reduced.
Example-An example of a reduction is when iron reacts with oxygen, forming iron oxides such as those called rust. The iron is oxidized and the oxygen is reduced. This is called redox. A blast furnace reverses that reaction, using carbon monoxide as a reducing agent to reduce the iron.
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Answer:
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Explanation:
(i) In a redox reaction, the reductant transfers
electrons to the oxidant.
(ii) Then in the reaction, the reductant or reducing
agent loses electrons and is oxidised and the
oxidant or oxidizing agent gains electrons and is
reduced.
(iii) ∴ Hence, in the above equation, reductant is SO2
and oxidant is H2
S
MnO2
+ 4HCl → MnCl2
+ 2H2
O + Cl2
↑
(i) Reductant: MnO2
- as it loses oxygen.
(ii) Oxidant: HCl - as it gains oxygen.